Paper ID #9578 Information Visualization for Product Lifecycle Management (PLM) Data Ms. Chen Guo, Purdue University Chen Guo serves as a Teaching Assistant in the Department of Computer Graphics Technology at Purdue University. She is currently pursuing her PhD in CGT from the College of Technology. Since 2011 she has taught courses in Construction Graphics, Computer Graphics, Product Design, Simulation and Visualization. Her research interest includes in the area of Graphic Design, Information Visualization and Interactive Media. Dr. Yingjie Victor Chen, Purdue University, West Lafayette Dr. Yingjie Chen is an assistant professor in the department of computer graphics technology of Pur- due university. He received his Ph.D. degree in the areas of human-computer interaction, information visualization, and visual analytics from the School of Interactive Arts and Technology at Simon Fraser University (SFU) in Canada. He earned Bachelor degree of Engineering from the Tsinghua University (China), and a Master of Science degree in Information Technology from SFU. His research covers inter- disciplinary domains of Information Visualization, Visual Analytics, Digital Media, and Human Computer Interaction. He seeks to design, model, and construct new forms of interaction in visualization and system design, by which the system can minimize its influence on design and analysis, and become a true free extension of human’s brain and hand. Dr. Craig L. Miller, Purdue University, West Lafayette Dr. Nathan W. Hartman, Purdue University, West Lafayette Nathan Hartman is an Associate Professor in the Department of Computer Graphics Technology at Purdue University, and Director of the Purdue University PLM Center of Excellence. Dr. Hartman is also Director of Advanced Manufacturing in the College of Technology. His research focuses on examining the use of 3D CAD tools in the product lifecycle, the process and methodology for model-based definition and the model-based enterprise, geometry automation, and data interoperability and re-use. He currently teaches courses in 3D modeling, virtual collaboration, 3D data interoperability, and graphics standards and data exchange. Professor Hartman also leads a team in the development and delivery of the online Purdue PLM Certificate Program and in the development of the next-generation manufacturing curriculum at Purdue focusing on manufacturing systems and the holistic product lifecycle. Amy B Mueller, Purdue University, West Lafayette Amy B Mueller is a Clinical Assistant Professor in the College of Technology, Purdue University, West Lafayette campus. She received her BS in ME from Purdue University and her MBA in Information Systems from the University of Toledo. Before joining the faculty in 2012, Ms. Mueller spent over 30 years in industry and her career parallels the progression of CAD/CAM to PDM to PLM. She has held industry positions with Owens-Illinois, Parametric Technology, Cummins, Faurecia and Toyota Industrial Equipment as well as a VAR and a consulting firm. She has held previous adjunct teaching positions with the University of Toledo and Ivy Tech Community College. Ms. Mueller also worked as the Director of Minds on Math for the Bartholomew County School Corporation which is an after school math enrichment program for fourth graders. She is a member of ASEE, ACM and SWE. Dr. Patrick E. Connolly, Purdue University, West Lafayette Patrick Connolly is a Professor and Interim Head of the Department of Computer Graphics Technology with Purdue University at West Lafayette, Indiana. He received his Bachelor of Science degree in De- sign and Graphics Technology and Master of Science degree in Computer Integrated Manufacturing from Brigham Young University in Provo, Utah. He completed his Ph.D. in Educational Technology at Purdue University. Dr. Connolly has been teaching at Purdue since 1996, and is active in several professional organizations. Prior to entering academia, he worked for twelve years in the aerospace and computer soft- ware industries and has extensive experience in CAD applications and design, CAE software support, and customer service management. His interests include solid modeling applications, virtual and augmented reality, visualization techniques, innovative teaching methods, and distance learning. c American Society for Engineering Education, 2014
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Paper ID #9578
Information Visualization for Product Lifecycle Management (PLM) Data
Ms. Chen Guo, Purdue UniversityChen Guo serves as a Teaching Assistant in the Department of Computer Graphics Technology at PurdueUniversity. She is currently pursuing her PhD in CGT from the College of Technology. Since 2011she has taught courses in Construction Graphics, Computer Graphics, Product Design, Simulation andVisualization. Her research interest includes in the area of Graphic Design, Information Visualization andInteractive Media.
Dr. Yingjie Victor Chen, Purdue University, West LafayetteDr. Yingjie Chen is an assistant professor in the department of computer graphics technology of Pur-due university. He received his Ph.D. degree in the areas of human-computer interaction, informationvisualization, and visual analytics from the School of Interactive Arts and Technology at Simon FraserUniversity (SFU) in Canada. He earned Bachelor degree of Engineering from the Tsinghua University(China), and a Master of Science degree in Information Technology from SFU. His research covers inter-disciplinary domains of Information Visualization, Visual Analytics, Digital Media, and Human ComputerInteraction. He seeks to design, model, and construct new forms of interaction in visualization and systemdesign, by which the system can minimize its influence on design and analysis, and become a true freeextension of human’s brain and hand.
Dr. Craig L. Miller, Purdue University, West LafayetteDr. Nathan W. Hartman, Purdue University, West Lafayette
Nathan Hartman is an Associate Professor in the Department of Computer Graphics Technology at PurdueUniversity, and Director of the Purdue University PLM Center of Excellence. Dr. Hartman is also Directorof Advanced Manufacturing in the College of Technology. His research focuses on examining the use of3D CAD tools in the product lifecycle, the process and methodology for model-based definition and themodel-based enterprise, geometry automation, and data interoperability and re-use. He currently teachescourses in 3D modeling, virtual collaboration, 3D data interoperability, and graphics standards and dataexchange. Professor Hartman also leads a team in the development and delivery of the online Purdue PLMCertificate Program and in the development of the next-generation manufacturing curriculum at Purduefocusing on manufacturing systems and the holistic product lifecycle.
Amy B Mueller, Purdue University, West LafayetteAmy B Mueller is a Clinical Assistant Professor in the College of Technology, Purdue University, WestLafayette campus. She received her BS in ME from Purdue University and her MBA in InformationSystems from the University of Toledo. Before joining the faculty in 2012, Ms. Mueller spent over 30years in industry and her career parallels the progression of CAD/CAM to PDM to PLM. She has heldindustry positions with Owens-Illinois, Parametric Technology, Cummins, Faurecia and Toyota IndustrialEquipment as well as a VAR and a consulting firm. She has held previous adjunct teaching positions withthe University of Toledo and Ivy Tech Community College. Ms. Mueller also worked as the Director ofMinds on Math for the Bartholomew County School Corporation which is an after school math enrichmentprogram for fourth graders. She is a member of ASEE, ACM and SWE.
Dr. Patrick E. Connolly, Purdue University, West LafayettePatrick Connolly is a Professor and Interim Head of the Department of Computer Graphics Technologywith Purdue University at West Lafayette, Indiana. He received his Bachelor of Science degree in De-sign and Graphics Technology and Master of Science degree in Computer Integrated Manufacturing fromBrigham Young University in Provo, Utah. He completed his Ph.D. in Educational Technology at PurdueUniversity. Dr. Connolly has been teaching at Purdue since 1996, and is active in several professionalorganizations. Prior to entering academia, he worked for twelve years in the aerospace and computer soft-ware industries and has extensive experience in CAD applications and design, CAE software support, andcustomer service management. His interests include solid modeling applications, virtual and augmentedreality, visualization techniques, innovative teaching methods, and distance learning.
Information Visualization for Product Lifecycle Management (PLM) Data
Abstract
Enabling users to explore the vast volumes of data from different groups is one of product lifecycle management (PLM)’s goals. PLM must solve such problems as isolated “Islands of Data” and “Island of Automation”; the massive data flow of distanced collaborative design, manufacturing, and management; and the incapability of interpreting and synthesizing data from different perspectives.
This paper proposes a new approach from a different perspective: information visualization and visual analytics. An interactive information visualization approach was demonstrated in order to help designers gain insights into massive data and make appropriate decisions. Suggested are possible visualization methods for PLM data- structural visualization, temporal visualization, geospatial visualization, 3D model visualization, and multidimensional visualization. This idea is then demonstrated by a case study of developing an Internet-based information visualization system to visualize the Remote Control Helicopter.
Introduction
Product lifecycle management (PLM) is the process of managing the entire lifecycle of a product from its design and production to service support and retirement. Nowadays, PLM has become a mission-critical component for manufacturers, and it forms the information backbone of a product and its company1. However, facing the explosion of digital product data and different user requirements, the development of PLM is limited by (1) isolated “Islands of Data” and “Island of Automation,” (2) the massive data flow of distanced collaborative design, manufacturing, and management; and (3) incapability of humans interpreting and synthesizing data from different perspectives. The current state severely limits communication across different user groups and discourages collaborative management and concurrent product development.
3D models are used in almost all current PLM systems, which provide a realistic representation of the product in context. However, there are disadvantages in using these models. First, some parts may be invisible because they are covered by other components. People can choose section views to show interior details, but they may miss part of the external features of the object. Second, although photorealistic rendering makes the final product image look nice, the real material may be covered by the appearance of output. Moreover, some materials may have the same look in a 3D model, but they may have different weight and strength value in the real world. Lastly, 3D model visualization is unable to show metadata such as material, weight, and price.
Now PLM starts to combine 3D models with 2D visualization graphs. Teamcenter allows designers and engineers to view basic 3D measurement and 2D markup tools in a single environment. ENOVIA not only offers 3D visualization tools, but also provides 2D visualization services such as line charts and tree graphs. However, these provided 2D visualizations are still very simple in our view. The full potential of visualization has not been utilized. We believe it is essential to embed 2D visualization tools within 3D models. The integration will enable product
lifecycle participants to understand and analyze data quickly and accurately, resulting in shortened development times and lower lifecycle costs.
Growing out from the fields of Information Visualization (Infovis) and Scientific Visualization (Scivis), Visual Analytics (VA) promotes the development of science and technology in analytical reasoning, data transformation, and representations for computation and visualization2. VA has been shown to be efficient at handling massive, dynamic, and conflicting data. With the help of VA, people can synthesize information into knowledge, derive insights from data, and provide timely and understandable assessments. However, very few PLM tools currently provide sufficient visual capabilities to help users analyze abstract data. Therefore people have an absence of an exploratory “middle ground” to connect the PLM with VA technologies. Beginning in the 1990s, Internet-based PLM systems have provided a more flexible platform for users to share and work on data. The focus of this paper is to enable a new class of product data analysis tools by integrating VA technologies and Internet-based data communication into PLM. We envision that the innovative integration will accommodate communications across different groups, catalyze creative design ideas, support the exploratory data management process, and thus improve the full product lifecycle from design to manufacturing and beyond.
Current Visualization Attempts to Support PLM Data
PTC offers a robust set of 2D and 3D visualization solutions called Windchill Visualization Services (WVS) that enables users to view components by using Creo View3. Siemens provides two solutions for visually analyzing the product during its design process. The first one is NX that uses HD3D Visual Reporting from metadata to help designers understand design issues. With different color-coded tags and “see-through” settings, users can see the inside components of 3D models and comprehend data quickly4. With the integration of product views and 2D snapshots, Teamcenter’s lifecycle visualization can send CAD data to the stand-alone application viewer or the Lifecycle Viewer to provide a complete view of the whole assembly5.
Almost all these projects use spreadsheets, basic information diagrams, and tree widgets to display the product information. However, very few existing PLM systems adopt sufficient visualization technologies to support data interpretation and management. Some pioneer projects include visualizing product variations and configurations6; the use of VA approaches to predict the effects of different parameters in car engine design7; applying interactive visual analysis to support simulation runs in a hybrid-vehicle design8; and managing the flow of iron and steel associated with car production9.
Currently, product data management (PDM) technology has been used in many different manufacturing enterprises to organize design files and processes. With JT Open, WebGL, or HTML5, some researchers propose that PDM provides a collaborative environment by the means of dynamically exchanging and collaboratively visualizing 3D models. Some researchers have created an interactive visualization platform for large aircraft development10. The interactive platform provides evolutionary information in product lifecycle stages that enable the chief project engineer to accurately make decisions. Semantic mapping approach is also used in aircraft tooling design. With the use of Teamcenter Engineering (TcEng) programming technology, the semantic transmission between aircraft tooling and inventories is highly improved11.
Also, several projects use Internet-based product information sharing and visualization aiming to conquer the issue of “Islands of Data”12, 13, 14, 15. The Web can be used at different stages of the PLM cycle: such as sharing product information and knowledge during the design stage12, managing product data with the simultaneous development13, and monitoring the performance of the working system14. A combination of WebGL and X3D technology allows the successful visualization of CATIA models to the Web. It facilitates Web-based collaboration and 3D mediated communication in PLM15.
VA research has been growing rapidly in recent years and has started to transfer from research labs to real applications in industry. For example, Purdue’s VACCINE center has developed a system to analyze the historic response of U.S. Coast Guard search-and-rescue operations in the Great Lakes. This tool can help decision makers allocate resources for rescue resources16. Wang et al17 develops a VA system to help bridge managers analyze bridges and plan maintenances. Wong et al18 created a visualization system called GreenGrid to examine power system information through semantic encoding, multilevel graph visualization, and force-directed layout. Jigsaw19 and CZsaw20 enable users to make sense of a large collection of text. They offer a collection of visualizations to detect the connection among alternatives. With document view, scatter-plot view, history view, and dependency graph, these visualizations can help users examine the connection between entities and support analytical strategies. Such VA systems have been widely adopted in many domains. But it is still rare to see the application of VA on PLM.
Possible Information Visualizations for PLM Data
An effective PLM environment enables an enterprise to gain deeper insights into product data and make better decisions. Manually reading the massive amounts of data created in the product lifecycle is simply not viable. In the section below, we discuss several information visualization techniques based on Shneiderman’s information visualization taxonomy21 and its possible usage for visualizing PLM data. With these technologies, users would comprehend different kinds of data easily. It will also help users identify problems and guide the direction for future product improvement.
Structural visualization
Tree graphs for hierarchical structure: Tree graphs are a group of linked nodes, and each node (except the root) has a parent node and possible subtrees of child nodes (the first image from left in Figure 1). Many PLM systems use a tree to visualize the products’ assembly hierarchy. Teamcenter’s BOM (bill of materials) relation browser views BOMs as an expanding tree with layered nodes. Inside nodes are 2D screenshots of the parts or subassemblies. The product specification tree in CATIA displays the component structure as a tree with different icons. Aras EPLM provides a deep vertical tree layout for the BOM structure browser and product structure browser. With the tree graph of the product family, the user can easily see the hierarchical structure of the product.
Sunburst partition to visualize quantitative measurements: Extended from a general tree graph, a sunburst graph is a radial visualization technique to visualize hierarchical data. The root node is in the center of the graph. People can get the child data with different arcs by adding additional
layers (the second image from left in Figure 1). Each arc represents an assembly in a product’s hierarchical structure. Sunburst demonstrates hierarchies shaped like donuts, and one arc represents to its related value. The direct connections among nodes are not as clear as regular tree graphs. But the length of arcs provides an additional dimension to represent quantity measurement of the part/subassembly.
Network graphs to visualize network relationship: Many times the connections of entities are complex. Instead of a tree structure’s one (parent) to many (children) relation, network connections are many to many, just like the physical connections of many parts inside one product. One part may be connected to many other parts, and may have been connected by many parts, which forms a network. Various types of network graphs visualize such types of data. A dependency wheel is a powerful visualization tool to explore directed relationships among a group of entities (the third image from left in Figure 1). In the disc, each chord diagram represents a connection between two nodes. This visualization tool also demonstrates simple interactivity by using a mouse hovering on a chord to mask other dependencies and highlight the selected dependencies with different colors.
Matrix diagram to visualize strengths of relationships: Similar to a dependency wheel, a matrix diagram is another powerful tool to show the strengths of relationships among two or more groups. The matrix diagram is created in a table with rows and columns corresponding to the correlated items. The rest of the cells contain symbols or numerical values to indicate the strengths of relationships. Color or saturation can be used to denote the relative weight to the evaluation, and they make it much easier for users to comprehend the relationship (the forth image from left in Figure 1). Comparing the messy linkages in a dependency wheel, the connections may show unique visual patterns that reveal some important product assemble information.
Figure 1: Possible Structural Visualization Methods22
Structural visualization is useful to display hierarchy and network data in PLM. By differentiating node properties, such as color, size and shape in tree graphs, researchers are able to represent different part attributes such as weight, size, and material. For the proportional size of the nodes in a sunburst, they can display the quantitative metrics of data such as mass, lead-time, or cost. The thickness of the curve in a dependency wheel or different colors between nodes in a matrix diagram can designate the strength of the connection among components. Thus engineers can make appropriate design decisions, such as which parts have shorter lifespans or weaker links.
Temporal visualization
The temporal visualization method allows researchers to visualize the temporal distribution of objects. Arc diagrams are well suited to display the chronology of nodes (Figure 2, top). By drawing arcs between nodes, the visualization shows node-to-node relationships and makes it clearer for users to see how the information may evolve. With stacked layers, a stream graph can display time series data in a flowing river shape (Figure 2, bottom left). Constraining the thickness of the stacked graph also enables users to get easy access to different types of data. A connected scatter plot is another good choice to visualize data in real time (Figure 2, bottom right). A simple linear relationship may be used to represent the work-flow information related to the products.
Figure 2: Possible Temporal Visualization Methods22
Temporal visualization is useful to display the connection between time series data. Users can simulate product maintenance and see the cost changes over time, thus enabling them to plan ahead. These graphs can provide a set of prebuilt analytics that facilitate the management to maintain cost, quality, and lead time targets with temporal information. It would help designers reduce risks and raise product quality before the designs are used for full-scale manufacturing.
Geospatial visualization
Geospatial visualization helps users explore location-related data in a map view. Different kinds of color progression are used in choropleth maps to compare data values properly (Figure 3, left). By adding symbols or graphs such as circles, histograms and pie charts over an underlying map, users can create a proportional symbol map that enables them to visualize the proportion of each area (Figure 3, middle). A dot distribution map uses dot size and spacing to communicate the geographic distribution of events (Figure 3, right). Geospatial visualization is a natural choice for
detecting spatial relationships among geologically related data and helps users comprehend phenomena.
Figure 3: Possible Geospatial Visualization Methods22
Geospatial visualization tools provide users with the ability to visualize spatial relationships within large data sets. Most PLM data has a geographic location such as plant locations across the world, distributions of buyer values and seller costs, and sales territories. Oracle Business Intelligence Suite offers numerous geospatial visualization methods for PLM data. They deliver deeper analytical insights through thematic map visualization and add bar charts, graphs, and detailed reports to the map view. Anything that contains a physical location such as revenue, billed quantity, and shipped amount can be leveraged by geospatial visualization tools.
Multidimensional visualization
Multidimensional visualization is developed to deal with data of more than two attributes. The common visualization techniques for multidimensional visualization are bar chart, pie chart, parallel coordinate plot, scatter plot matrix, heat map and tree map. For example, each vertical axis in parallel coordinates corresponds to each of the dimensions, and its value represents the dimensional data (Figure 4, left). All the individual data elements are color coded and connected by lines depending on different characteristics. A scatter plot matrix is widely used for pairwise relationships. It shows ordered groupings of dimensions along vertical and horizontal axes (Figure 4, right).
Figure 4: Possible Multidimensional Visualization Methods22
Multidimensional data is everywhere in PLM. A multilevel product can consist of multiple subassemblies and parts1. Many PLM applications use BOM to show a detailed list of data
attributes. Most often the BOM is stored as a spreadsheet. It will be very hard to read if there are many parts in the BOM. Although the data can be put into a relational database to query limited information, it requires special training to use a database, and it costs more time and money. Thus multidimensional visualization techniques are suited to show the higher dimensions of BOM data. They can display the relationships among sales data, material types, warranty claims, and geometric information about parts. Moreover, through interactive filtering, zooming, and brushing, the visualization can provide more-focused analyses and touch different functions across the product lifecycle.
Obviously, information visualization provides various perspectives on PLM data through multiple visualization modules. It would enable any PLM user, including participants from design, engineering, manufacturing, and marketing, to interpret and share PLM data. The barriers of “islands of data” can be broken down, and different participants in the lifecycle can demonstrate their expertise and also inspire others with good problem-solving ideas.
A Case Study
This paper demonstrates the idea by a case study of developing an Internet-based information visualization system to help users interpret, manage, and analyze PLM data. Users can gain insight into the data via an overview of relationship, zooming, connecting and navigating. The representative data is collected from the Shuang Ma 9053 RC Helicopter (Figure 5).
Figure 5: The Shuang Ma 9053 RC Helicopter 3D Model
Framework of the Web-based product data visualization system
The framework for the Web-based visualization system is divided into three different layers according to Model-View-Controller (MVC) design23. The project constructed the 3D geometric model via CATIA and then extracted all the metadata for each assembly from CATIA to create a Bill of Material (BOM). The data include but are not limited to part number, file name, assembly level, volume, mass and link to different parts or components. Such data comprise the model layer. The controlling layer is responsible for service requests and query-task execution. With requests, such as finding a spare part or searching a subtree, the server can extract and display
PLM data. The view layer aims to provide rich interactive visualization interfaces for different roles of PLM users. Different users may be interested in different perspectives of the data. Industrial designers may be interested in the look and feel of the product, which is the 3D mode visualization. Some engineers may be interested in finding the weakest link in the product. Others may be interested in seeing the cost of parts in the product and looking for ways to reduce costs. Effectively combining visualization tools, the system can lead to better product understanding and help users make accurate decisions.
Product data visualization
The model was built according to the Shuang Ma 9053 RC helicopter specifications (Figure 5). Researchers implement three different visualization graphs for RC helicopter data with the D3js library (http://www.d3js.org). The platform enables users to click an individual node to see its 3D form and metadata structure in the webpage based on HTML 5’s WebGL technologies and three.js (http://www.threejs.org).
Figure 6: A Tree Graph to Visualize Hierarchy Data and Make Trade-offs
Visualizing general hierarchy of product data: The hierarchical tree visualization helps users see the product hierarchy, determine which parts will be required when assembling, and make it easier to find part replacements. The tree graph visualization tool enables designers to view a node’s “parent” and “sibling” (Figure 6). We provide a radial view with circular wedges to show the parent-child relationships. The root is in the center with different layers growing around it. The depth of each node refers to the path to its root and the link length represents the strength of
connection between nodes. Currently such trees must be widely adopted to visualize the Bill of Material (BOM) data of a product. There is a strong need in PLM to understand the connection between entities and manipulate sub-trees in the structure. Such analysis requires a combination of different visualization techniques. This tree graph uses the connection technique to help user explore hierarchical data from multiple views. By clicking on each node, users will navigate to a webpage showing the node’s corresponding part tree and related metadata information, making it easier to gain insight into sub-assembly data. Through connecting and navigating, users can interact with the tree structure and clarify the relationships in the data.
Making appropriate trade-offs between attributes: Engineering designers are always seeking appropriate solutions to product development. The nodes and edges in a tree can be utilized to display many attributes of the represented entity. The color of each node encodes the materials (Figure 6). Orange is assigned to multiple materials, gray to aluminum, blue to plastic and red to unavailable materials. Node size is related to part weight. Designers can make appropriate trade-offs between material, volume, and weight. Knowing the weight and bounding size of each part can help designers find the heaviest parts and stay within certain weight constraints. Other than color and size, a node can also use different shapes and boundaries to represent more attributes, for example, costs and lifespan. Within a limited display space, a static tree graph cannot accommodate extreme complex products that contain millions of parts and many hierarchical layers, for example, the Boeing 777, which has more than 6,000,000 parts. One direct solution is to create a collapsible tree graph and brings in interaction. By default, it only displays a certain level of the hierarchy without expanding to the end leaves. The user can interact with the graph to expand or collapse branches (Figure 7) by clicking on nodes. Also some visualization techniques have been proposed to visualize large trees, such as a botanical tree to visualize large information sets24, a focus+context (fisheye) technique for displaying huge hierarchical structures25 and SpaceTree to support aggregation and navigation in the large hierarchy with screen-optimized dynamic layout of nodes26.
Figure 7: A Collapsible Tree Graph to Expand or Collapse Branches
A zoomable sunburst partition is also created to demonstrate the quantity percentage of the attributes of parts (e.g., weight and costs). It uses radial space-filling visualization with labels aligned with each arc’s angle span to show part names. The color of each represents the material, and the proportional size of the node encodes the relative cost (or weight) of the material (Figure 8). This visualization technique also supports mouse hovering and clicking interaction. By hovering and clicking each node, users can smoothly zoom in and zoom out of the hierarchy. This simple interaction approach allows users to highlight certain items among thousands of elements. Thus, Designers can quickly see how much it would cost to use the material and thus have a better focus on improving the product, for example, spending more time to redesign to most expensive (or to the heaviest) parts to reduce the overall cost of the product.
Figure 8: A Zoomable Sunburst to Visualize Hierarchy Data and Relationships
Finding the strength of connection between components: Based on the helicopter BOM data, we created an L-matrix diagram to display the network relationship among parts. The strength of connection indicates the relationship between individual components. An example of a vulnerable connection would be the connection between the battery and the battery holder. An example of a strong connection would be the concentric constraint between the blade mount and the shaft of the Shaft B Subassembly. We put each part number into the corresponding row and column of cells in a spreadsheet. The color squares represent the strength of the connection
between the component in the x-axis and the other one in the corresponding y-axis. There is no sense in comparing a part to itself so the light blue squares mean that there is no correlation between them. Dark blue encodes a weak connection, and orange designates a strong connection (Figure 9). The closer the connection assignment is to the light blue diagonal, the closer the components are in the actual 3D model. For maintenance, repair and operations (MRO) of aircraft, the visual analytic tool will help them quickly find problems and make the right decision. The user can also see the importance of one part in terms of connectivity by looking at color squares in one row (or column). The more squares, the more connections the part is linked to other parts. Therefore, this part may merit closer attention for maintenance because its failure may cause the failure of other parts.
Figure 9: A Matrix Diagram to Visualize Physical Connections Among Assemblies
Mapping product structure into a 3D geometric model: The node tree graph conveys more-abstract information to users, and the 3D model shows more-realistic information. With HTML 5 and WebGL technology, the platform integrated the node tree and 3D models on the Web page (Figure 10). If users click a node, it will link to the Web page with an integration of a subtree graph, a table of product data, and a simplified part model. The subtree graph is on the top right of the following figure and it contains hierarchical information of the helicopter base. Detailed subassembly information is displayed on the top left of the following figure and users can view the metadata such as part number, material and assembly level of the base. The corresponding 3D base model is at the bottom of the figure. Users can rotate the model for 360 degree view with a mouse. With an integration of all these visualizations, customers will have a better understanding of the product development information, and various departments will have a more-effective communication to share ideas and thoughts for innovation and evaluation.
Figure 10: Web-based Product Visualization Platform for Helicopter
Conclusion and future work
We demonstrated using information visualization technologies to communicate product abstract data with vivid 3D models. This research is not intended to replace 3D models. A 3D geometric model is by far the most intuitive and popular way to provide a realistic representation of a product in context. It also delivers better insight into surface patterns of objects and enables designers to inspect for errors that might occur in the drawing process. In traditional PLM environment, designers are always working with 3D solid data, and it is not easier for them to deeply visualize hierarchical structure of product data or gain insights into important 2D information. Possible visualization techniques such as structural visualization, temporal visualization, geospatial visualization, 3D model visualization, and multidimensional visualization allow users to interactively explore large PLM data resources. Moreover, combining 2D graph data with 3D solid model will provide a faster and more intuitive way to make decisions.
While designing a visualization graph, for given type of data, there may exist several different visualization algorithms that the designer can choose. Also the choice of color, layout details, and graph elements vary greatly depending upon the nature of the data, the main purpose of product data communication, and the readers’ acceptance of different visualization methods. In this paper, we have presented our first approach of using information visualization to communicate product data. We can see that there is still a lot of work to be done in this area. The data in the use cases we gathered are directly from the 3D model of the RC helicopter. Figure 6 and Figure 8 are created based upon the same data, but displayed in totally different ways. The L-matrix diagram (Figure 9) can also be shown in different ways, such as the circular layout for networks (the third image from left in Figure 1). Compared with the circular layout, the L-matrix is wasting space, but is well organized and easier for users to read and understand the connections among different parts.
The ultimate goal of the research is to bring the power of visual analytic tools to mainstream PLM applications, e.g., Dassault’s ENOVIA27 or Siemens’ Teamcenter5. This will not only benefit engineering design and make economic sense, but it will also increase customer satisfaction. In the future, research will conduct user evaluations with internal controlled experiments and external usability surveys. Researchers will also iteratively conduct cycles of design and evaluation.
Acknowledgement
Special thanks to Zhenyu Cheryl Qian, assistant professor of Interaction Design, Nityeshranjan Bohidar, Edgar Flores, Carter E Grove, Cameron Bolinger Horton, undergraduate students from the Purdue University, for their contribution in this research.
Bibliography
1. J. Stark, Product lifecycle management: 21st century paradigm for product realisation. Springer, 2011. 2. K. A. Cook and J. J. Thomas, Illuminating the Path: The Research and Development Agenda for Visual
6. A. Pleuss and G. Botterweck, “Visualization of variability and configuration options,” International Journal on Software Tools for Technology Transfer (STTT), pp. 1–14, 2012.
7. W. Berger, H. Piringer, P. Filzmoser, and E. Gröller, “Uncertainty-Aware exploration of continuous parameter spaces using multivariate prediction,” in Computer Graphics Forum, vol. 30, pp. 911–920, 2011.
8. K. Matkovic, M. Ðuras, D. Gracanin, R. Splechtna, B. Stehno and H. Hauser, “Interactive visual analysis in the concept stage of a hybrid-vehicle design,” in EuroVis Workshop on Visual Analytics, 2013, pp. 61–65.
9. S. Nakamura, Y. Kondo, K. Matsubae, K. Nakajima, and T. Nagasaka, “UPIOM: a new tool of MFA and its application to the flow of iron and steel associated with car production,” Environ. Sci. Technol., vol. 45, no. 3, pp. 1114–1120, Feb. 2011.
10. H. Wang, G. Zhao, W. Wang, and C. Chen, “The design and implementation of the platform of interactive information visualization on aircraft product development,” in System Science, Engineering Design and Manufacturing Informatization (ICSEM), 2012 3rd International Conference (IEEE), 2012, vol. 1, pp. 180-184.
11. Y. Li, R. Yan, and J. Jian, “A semantics-based approach for collaborative aircraft tooling design. Advanced Engineering Informatics,” Advanced Engineering Informatics, vol.24, no. 2, pp. 149–158, 2010.
12. M. R. Cutkosky, R. S. Engelmore, R. E. Fikes, M. R. Genesereth, T. R. Gruber, W. S. Mark, J. M. Tenenbaum, and J. C. Weber, “PACT: An experiment in integrating concurrent engineering systems,” Computer, vol. 26, no. 1, pp. 28–37, 1993.
13. P. Trott, Innovation management and new product development. Prentice Hall, 2008. 14. H. L. Broberg and others, “Internet-based monitoring and controls for HVAC applications,” Industry
Applications Magazine, IEEE, vol. 8, no. 1, pp. 49–54, 2002. 15. P. Siltanen, and S. Valli, “Web-based 3D Mediated Communication in Manufacturing Industry,” in Concurrent
Engineering Approaches for Sustainable Product Development in a Multi-Disciplinary Environment, pp. 1181-1192, 2013.
16. A. Malik, R. Maciejewski, B. Maule, and D. S. Ebert, “A visual analytics process for maritime resource allocation and risk assessment,” in Visual Analytics Science and Technology (VAST), 2011 IEEE Conference on, 2011, pp. 221–230.
17. X. Wang, W. Dou, S. E. Chen, W. Ribarsky, and R. Chang, “An interactive visual analytics system for bridge management,” in Computer Graphics Forum, 2010, vol. 29, pp. 1033–1042.
18. C. P. Wong, K. Schneider, P. Mackey, H. Foote, G. Chin, R. Guttromson and J. Thomas, “A novel visualization technique for electric power grid analytics,” Visualization and Computer Graphics, IEEE Transactions on, vol. 15, no. 3, pp. 410-423, 2009.
19. J. Stasko, C. Görg, and Z. Liu, “Jigsaw: supporting investigative analysis through interactive visualization,” Information visualization, vol. 7, no. 2, pp. 118–132, 2008.
20. N. Kadivar, V. Chen, D. Dunsmuir, E. Lee, C. Qian, J. Dill, C. Shaw, and R. Woodbury, “Capturing and supporting the analysis process,” in Visual Analytics Science and Technology, 2009. VAST 2009, IEEE Symposium on, 2009, pp. 131–138.
21. B. Shneiderman, “The eyes have it: A task by data type taxonomy for information visualizations,” in Visual Languages, 1996. Proceedings, IEEE Symposium on, 1996, pp. 363–343.
22. d3js.org, “Data-Driven Documents.” [Online]. Available: http://www.d3js.org. [Accessed: 4-Jan-2014]. 23. E. G. Krasner and T. S. Pope, “A description of the model-view-controller user interface paradigm in the
smalltalk-80 system,” Journal of Object Oriented Programming, vol. 1, no. 3, pp. 26–49, 1988. 24. E. Kleiberg, H. Van De Wetering, and J. J. Van Wijk, “Botanical visualization of huge hierarchies,” In
Information Visualization, IEEE Symposium on, 2001, pp. 87-87. IEEE Computer Society.
25. J. Lamping, R. Rao, and P. Pirolli, “A focus+ context technique based on hyperbolic geometry for visualizing large hierarchies,” In Proceedings of the SIGCHI conference on Human factors in computing systems, 1995, pp. 401-408. ACM Press/Addison-Wesley Publishing Co..
26. N. Elmqvist and D. J. Fekete, “Hierarchical aggregation for information visualization: Overview, techniques, and design guidelines,” Visualization and Computer Graphics, IEEE Transactions on, vol. 16, no. 3, pp. 439-454, 2010.
Impact of Optional Supplemental Course to Enhance Spatial VisualizationSkills in First-Year Engineering Students
Dr. Deborah M. Grzybowski, Ohio State University
Dr. Grzybowski is a Professor of Practice in the Engineering Education Innovation Center and the Depart-ment of Chemical and Biomolecular Engineering at The Ohio State University. She received her Ph.D.in Biomedical Engineering and her B.S. and M.S. in Chemical Engineering from The Ohio State Uni-versity. Prior to becoming focused on engineering education, her research interests included regulationof intracranial pressure and transport across the blood-brain barrier in addition to various ocular-cellularresponses to fluid forces and the resulting implications in ocular pathologies.
Ms. Olga Stavridis, Ohio State University
Ms. Olga Stavridis, Ohio State University Olga Stavridis is a Lecturer in the College of Engineering atOhio State University, teaching First-Year Engineering for Scholars (Humanitarian Section) classes in theEngineering Education Innovation Center. She also teaches Spatial Visualization, Engineering GraphicPresentation for non-engineers and Computer Graphics SolidWorks courses. Olga earned her bachelor’sdegree in Industrial and Systems Engineering from Ohio State University and her Master’s in IndustrialEngineering from Arizona State University.
Ms. Lisa A. Barclay M.S., The Ohio State UniversityDr. Lisa Abrams, The Ohio State University
Lisa Abrams is currently serving as the Interim Director of Diversity and Outreach for the College ofEngineering at The Ohio State University. She oversees the Women in Engineering and Minority En-gineering programs promoting a culture of diversity in the College through recruitment, retention, andadvancement of underrepresented groups at all levels. Lisa received her Bachelor’s and Master’s Degreesin Mechanical Engineering and PhD degree in Industrial Engineering from Ohio State. She has sevenyears of industry experience in the areas of Design and Consulting. She was previously the Director ofWomen in Engineering Program at Ohio State and the Assistant Dean of the School of Engineering andApplied Science at Miami University. She mostly recently held the position of Assistant Professor ofPractice in the Department of Mechanical and Aerospace Engineering at Ohio State where she taught awide variety of engineering courses in First Year Engineering and Mechanical Engineering. In the lastseveral years, she has received four teaching awards including the 2013 Boyer Award for Excellence inUndergraduate Teaching Engineering Innovation and the Charles E. MacQuigg Award for OutstandingTeaching.
Dr. Sheryl A. Sorby, Ohio State University
Dr. Sheryl Sorby is a Professor Emerita of Mechanical Engineering-Engineering Mechanics from Michi-gan Technological University. She is currently serving as a Fulbright Scholar at Dublin Institute of Tech-nology. She recently served as a Program Director within the Division of Undergraduate Education at theNational Science Foundation. Her research interests include graphics and visualization. She has been theprincipal investigator or co-principal investigator on more than $9M in external funding and is the authorof numerous publications and textbooks. She was the recipient of the Betty Vetter research award throughWEPAN for her work in improving the spatial skills and ultimately the success of women engineeringstudents. Dr. Sorby currently serves as an Associate Editor for ASEE’s online journal, Advances in Engi-neering Education. In 2007, she received the Distinguished Service Award from the Engineering DesignGraphics Division of ASEE and in 2009 she was elected to Fellow status in ASEE.
Jessica Thomas, Ohio State UniversityDr. John A Merrill, The Ohio State University
John A. Merrill is the Associate Director of the Engineering Education Innovation Center at The OhioState University, which includes the First-Year Program. Approximately 2300 students annually takecourses in fundamentals designed to ensure student success through rigorous academics in a team-basedenvironment. His responsibilities include operations, faculty recruiting, curriculum management, studentretention, and program assessment. Dr. Merrill received his PhD in Instructional Design and Technologyfrom The Ohio State University in 1985, and has an extensive background in public education, corporatetraining, and contract research. He has made presentations at conferences held by the American Societyfor Engineering Education (ASEE) and its affiliate conference, Frontiers in Education (FIE). Dr. Merrillcurrently serves as an advisor for Engineers for Community Service (ECOS), a student-run organization atOhio State. He teaches a Service-Learning course for Engineering students, which also involves projectson behalf of a rural orphanage and vocational school in Honduras. He is a two-time recipient of theCollege of Engineering’s Boyer Award for Excellence in Teaching.
Address: The Ohio State University, 2070 Neil Ave., 244E Hitchcock Hall, Columbus, OH 43210-1278;telephone: (+1) 614.292.0650; fax: (+1) 614.247.6255; e-mail: [email protected].
11. Wai, J., Lubinski, D., and Benbow, C.P. “Spatial Ability for STEM Domains: Aligning Over 50 Years of
Cumulative Psychological Knowledge Solidifies Its Importance.” Journal of Educational Psychology, Vol.
101, No. 4, 817–835, 2009.
Paper ID #9841
Assessment of Students’ Changed Spatial Ability Using Two Different Cur-riculum Approaches; Technical Drawing Compared to Innovative ProductDesign
Dr. Mark E Snyder, Illinois Institute of Technology
Architectural Engineering Faculty at IIT. Creating and testing innovative classroom pedagogy for the last10 years. Evaluating the link between visualization and improved abstraction skills to specific classroomactivities. Investigating the connection between ethical judgement and academic motivation to improvethe learning environment.
Prof. Matthew Spenko, Illinois Institute of Technology
Assessment of Students’ Changed Spatial Ability Using Two Different Curriculum Approaches; Technical Drawing Compared
to Innovative Product Design
Introduction
Improving student performance on academic tasks in mathematics, science and engineering appears to occur when students’ spatial visualization skills have been improved. Studies have found improving spatial visualization can increase success in chemistry (Carter, et.al, 1987)1, reduce math anxiety (Maloney, et.al., 2011)2, improve calculus grades (Sorby, et.al., 2012)3, and increase retention and success in science and engineering curricula (Potter, et.al., 2006)4. Creativity in the sciences and engineering seems directly related to spatial visualization based on work by Kozhevnikov, et.al. (2013)5.
A widely used pathway to improve students’ spatial abilities employs three-dimensional software programs that enable a student to create an object and manipulate the object in real-time. Yet, studies seem to suggest that this approach is not always successful when spatial ability is tested using a standard spatial ability test. Work by Frey et.al. (2000)6 and Towle et.al. (2005)7 indicate that sole use of three-dimensional imaging software does not improve spatial ability in a significant way. Other work by Study et.al., (2011)8 and Veurink et.al, (2009)9 suggest that a mixed approach using hand drawing techniques and software may be more effective in increasing spatial abilities.
Finding an effective approach to improve spatial ability is considered an important research and pedagogical imperative for the profession of engineering. Research by Charyton et.al., (2011)10 explored the relationship between spatial visualization and creativity in engineering design tasks and found convergent validity between assessments for creativity and the Purdue Spatial Visualization Test-Rotations; this infers that improving spatial abilities may improve student creativity which, in turn, may help students meet today’s engineering challenges. Seminal work by Sheppard et.al., (2009)11 in Educating Engineers, Designing for the Future of the Field found design projects that could foster an “approximation to professional practice” were important to invoking a sense of real-world practice, improving teamwork and creativity but entered the curriculum too late to give students a sense of what professional practice entails. Therefore, increasing students’ spatial abilities in the context of design projects early in their academic career may be important for preparing students to enter practice with the mindset needed for the profession.
Study Purpose
This study attempts to determine to what degree a product design course involving creative real-world problem-solving, limited hand drawing, three-dimensional software modeling and building models improves students’ spatial ability compared to a traditional technical drawing class. The authors view this study as a pedagogical exploration that may establish an improved approach to significantly increase student’s spatial visualization capability and identify how changes are distributed over cohorts and genders.
Study Design
The Purdue Spatial Visualization Test – Rotations (PSVT-R) will be used to quantify a before-and-after change in student exposure to the course’s differing content and approach. The PSVT-R (Bodner and Guay, 1987)12 is used significantly in the literature as a standard test for spatial ability (Carter, et.al., 1987)1. The test utilizes a set of line drawings of an object that the test taker must manipulate mentally to arrive at a solution that mimics the rotations of an example object. Objects are not repeated and each question contains different example objects and test objects the student must manipulate mentally. The test is timed to prevent the test taker from analytically solving each problem; that is, draw in axes and determine the rotations needed to obtain the example object’s final orientation. The test is highly correlated to test takers scores on spatial tasks (Kovac, 1989)13 and has high construct validity (Branoff, 2000)14.
The PSVT-R was given to students before the beginning of each course and near the end of the semester. Data was gathered on student gender and class cohort at the time of testing. Only paired data sets (each student’s pre and post test score) are included in the final analysis to provide an overall assessment of change in spatial ability.
The two courses are referred to in this paper as MMAE 232 and CAE 100. The MMAE 232 course is the engineering design course and CAE 100 is the technical drawing course. Mechanical engineering and material science majors normally take MMAE 232 in their sophomore year. Civil engineering majors take CAE 100 in the freshmen or sophomore years, but many students take it when it fits easily in their curriculum plans.
MMAE 232 – Design for Innovation is a sophomore-level design course for mechanical engineers. It is the first in a series of three design courses. Although it is a sophomore level class, several juniors and seniors take the course, especially transfer students. Students take the second course in the series, which focuses on machine elements, in their junior year. The third and final design course is the capstone mechanical design course which students take their senior year.
The mechanical engineering department has taught Design for Innovation for three years, beginning in the fall of 2011. The course has three main objectives: 1) introduce design thinking and open-ended problem solving earlier in a student’s career, 2) teach technical writing, and 3) improve student use of three-dimensional CAD software.
Students begin the class with two-weeks of lecture on isometric hand-drawings, engineering drawings, and the basics of CAD software. Students use Autodesk Inventor for this class. Coupled with lectures are weekly 3-hour lab sections for the students to become familiar with the CAD software or work on their projects. In the lab sections, students follow a tutorial in a book (Autodesk Inventor Essentials by Thom Tremblay, Wiley Publishing). Instructors are present to help answer students’ questions. Coupled with this portion of the class are two individual assignments in which students must create part files, assembly files, and engineering drawings.
After the completion of the CAD assignments in the first three weeks, students form groups to focus on three open-ended design problems in which they must design and fabricate a device. In
the past two years, the problems have included a chair made entirely from foam-core board without any fasteners or glue, a trebuchet in which the main axle is made from ¼” diameter acrylic rod (this requires the students to perform stress and deflection analyses), and a bio-inspired robot fabricated using Arduino microprocessors and RC servos.
Each project focuses on a particular aspect of the design process. The chair represents sustainable design techniques such as light-weighting, whole-system design thinking, and lifecycle thinking. The trebuchet project encourages students to focus on the analysis portion of the design process, a step that many students overlook. The bio-inspired robot project introduces students to the bio-inspired design process, mechanism design, actuators, and mechatronics.
For each of the projects, students must create isometric sketches of their conceptual designs and engineering drawings of their final designs; as well as building the actual object and demonstrating that it works. Final grades are based on the quality of the technical communication as well as engineering drawings associated with each design phase.
CAE 100 – Introduction to Engineering Drawing and Design - is a freshmen level technical drawing class. Students who take this course may come from any cohort (freshmen, sophomore, junior or senior) since the class is not a pre-requisite for later courses. The text used in CAE 100 is Technical Drawing with Engineering Graphics, by Giesecke, et.al.,14th edition (2012)15. The course covers the basics of free-hand sketching and the use of instruments (triangles, t-squares and compass), lettering, isometric projection, orthographic projection, and two-dimensional drawings using scale. No computer software is used in this class.
CAE 100 spends a significant amount of time (almost a third of the semester) improving students’ free-hand sketching ability. Natural and mechanical objects are used as subjects of drawing. As students improve they are introduced to the basics of isometric drawing using hand drawing. This leads easily into perspective which is explored in the students’ collection of drawings. Instruments are introduced starting with lines, line thickness, lettering and the use of the compass.
Once orthographic perspective is introduced students perform orthographic hand drawing with simple objects. Measurement is introduced (types of measures, use of engineering and architectural scales) and related back to hand drawing of orthographic perspective of objects.
Use of the T-square and triangles are introduced in order to create orthographic drawings quickly and to proper scale. Continued practice with instruments and engineering objects give the students practice in creating accurate engineering drawings with appropriate dimensioning and are related to engineering drawings in various engineering disciplines. Grades in CAE 100 are based on completing a number of drawings and the quality of student’s orthographic drawings to meet industry standards.
General Results
The following tables show the overall data collected for both courses. Data are broken out into overall course scores on the PVST-R (out of 20 possible points) then by cohort and gender for CAE 100 and MMAE 232.
Table 1 shows results for the CAE 100 course. PSVT-R scores are means followed by standard deviation (SD). The column for increased and decreased scores is the number of such changes followed by the mean percentage change in PSVT-R score.
The general results show that the CAE 100 course had higher mean percentage increase in PSVT-R scores from pre to post test compared to the MMAE 232 course. Decreased and unchanged PSVT-R scores were similar for both groups. The CAE 100 male students started with lower PSVT-R scores then the male MAE 232 scores which is consistent with previous discipline specific PSVT-R studies that showed that mechanical engineering students (the MMAE 232 students) have a slightly higher PSVT-R scores then civil engineering students (Veurink, et.al., 2012)16. Interestingly the same study showed civil engineering females (CAE 100) should have PSVT-R scores similar to the MMAE 232 females, which is not the case for this study.
Analysis of Student Data A statistical analysis was undertaken to determine if the differences within the CAE 100 and MMAE 232 overall score changes for cohorts and gender indicated any statistically significant changes. A two-tailed T-test for paired data was performed for the CAE 100 course (all students). The calculation showed a significant difference in the scores for pre-test (m=14.14, SD=3.92) and post-test (m=15.69, SD=2.78) conditions; (t(41)=3.05, p=0.004). Cohen’s d statistic gave a value of 0.457 which makes the effect medium in scale (Cohen, 1988)17. An examination of the CAE 100 cohorts (freshmen, sophomore, etc) showed no statistically significant difference in pre- and post-test scores for the freshman, junior or senior cohorts. The sophomore cohort did show a statistically significant change in scores from pre-test (m=14.17, SD=4.04) and post-test (m=16.67, SD=2.41) conditions; (t(11)=2.51, p=0.029). Cohen’s d statistic was 0.759 which is considered a medium to large change. Gender differences for the CAE 100 course showed females did not have a statistically significant change in scores from pre- to post-test with the PSVT-R. Males did show a statistically significant change in scores from pre-test (m=14.65, SD=3.83) to post-test (m=16.19, SD=2.74) conditions; (t(30)=2.73, p=0.010). Cohen’s d was 0.459 which is considered a medium effect. Performing a two-tailed T-test for paired data for the MMAE 232 course (all students) showed no statistically significant change in scores from pre- to post-test with the PSVT-R. Examination of the MMAE 232 cohorts (sophomore, junior, and senior) also showed no statistically significant change from pre-to -post-test scores for the PSVT-R within each cohort. MMAE 232 gender grouping did show a statistically significant change from pre- to post-testing of the PSVT-R. MMAE 232 males showed a change from pre-test (m=15.12, SD=3.48) to post-test (m=16.09, SD=2.91) conditions; (t(32)=2.04, p=0.049). The Cohen’s d statistic was 0.302 considered a small to medium effect. There were not enough female pairs in MMAE 232 class to perform a T-test for females only. Discussion of Analysis The statistically significant moderate to large change in PSVT-R scores for the CAE 100 class and lack of an equivalent change in the MMAE 232 course indicates the use of product design coupled with three-dimensional software and building prototypes is not as effective at increasing students’ spatial ability compared to a focused technical drawing curriculum. Comparing the graded assignments of each course suggests to improve spatial ability student effort must be coupled with direct drawing assignments completed by all students to ensure an improvement in PSVT-R scores.
The CAE 100 course required each student to complete all drawing assignments for a grade while the MMAE 232 course utilized groups that handed in one set of drawings; potentially some students did not create drawings reducing the chance to improve their spatial visualization skills. Data was not collected on which students prepared drawings in MMAE 232 but faculty observation indicated that one student in each group accomplished most drawings handed in for assignments. The analysis indicated that the CAE 100 sophomore cohort showed a significant change in PSVT-R scores over the course of the semester. The sophomores involved in the study were in four separate sections so it does not appear that the score improvement was related to grouping the students together. Further testing and background information would have to be accomplished with all CAE 100 cohorts to establish common variables that may have influenced the improvement in PSVT-R scores. The percentage of students that showed no change or a decrease in PSVT-R scores for CAE 100 and MMAE 232 was 43% and 50% respectively. This sizable number suggests that some aspect of both courses is failing to influence students in a positive manner and should be explored to understand it as a confounding factor. Study Limitations Student perceptions of academic tasks were not assessed. This evidence, although anecdotal, would have provided a sense of; which assignments changed student perceptions of their spatial ability, did students in both classes receive the same number of impactful assignments, and whether the approach in either class was affecting the intended educational objectives. The affect of maturation on student PSVT-R scores is unclear. The authors believe the data gathered for this study are not adequate to make a statement concerning maturation effects and highlight the need for such information in future work to account for potential influence. Psychological assessments related to maturation via student motivation or perseverance on tasks may provide a means to assess a relationship between maturation and the PVST-R. Nearly half of the students in this study had no change or a decrease in PSVT-R scores regardless of the curriculum approach. The authors believe this statistic requires explanation. Unfortunately previous research does not appear to consider this aspect or provide explanations for its potentially confounding influence. The authors intend to examine this aspect in future work. The amount of student-faculty engagement was not quantified for this effort. The quality and degree of student-faculty engagement could be a significant variable. The MMAE 232 classes were typically large (over 90 students) with limited time for the faculty member to interact with groups. In CAE 100 classes were typically smaller than 15 students to each faculty member but did not include group projects. It is possible this difference in engagement may have affected PSVT-R changes in both courses.
Conclusion The use of a product design methodology coupled with hand drawing, three-dimensional software and prototyping of solutions had no statistically significant increase in PSVT-R scores. In contrast, a fairly traditional technical drawing class had a moderate to large significant increase in PSVT-R scores. Future work with these two classes should assess student perceptions of what assignment aspects seem to improve their spatial ability, quantify student maturation and attempt to assess and equalize the degree of student-faculty engagement in both classes. With these additional factors controlled the results of the current pedagogical exploration can be quantified with known or measurable classroom or cohort attributes that may facilitate the transferability of successful practices to other institutions that want to increase student’s spatial visualization skills. 1. Carter, C.S., Larussa, M.A., and Bodner, G.M. (1987). A Study of Two Measures of Spatial Ability as Predictors of Success in Different Levels of General Chemistry. Journal of Research in Science Teaching, 24(7), 645-657. 2. Maloney, E.A., Waechter, S., Risko, E.F., and Fugelsand, J.A. (2012). Reducing the Sex Difference in Math Anxiety: The Role of Spatial Processing Ability. Learning and Individual Differences. 22, 380-384. 3. Sorby, S., Casey, B., Veurink, N., and Dulaney, A. (2012). The Role of Spatial Training in Improving Spatial and Calculus Performance in Engineering Students. Learning and Individual Differences, 26, 20-29. 4. Potter, C., Van Der Merwe, E., Kaufman, W., and Delacour, J. (2006). A Longitudinal Evaluative Study of Student Difficulties with Engineering Graphics. European Journal of Engineering Education. 31(2), 201-214. 5. Kozhevnikov, M., Kozhevnikov, M., Yu, C.J., and Blazhenkova, O., (2013). Creativity, Visualization Abilities, and Visual Cognitive Style. British Journal of Educational Psychology. 83, 196-209. 6. Frey, G., and Baird, D. (2000). Does Rapid Prototyping Improve Student Visualization Skills. Journal of Industrial Technology. 16(4), 2-6. 7. Towle, E., Mann, J., Kinsey, B., O’Brien, E et.al. (2005). Assessing the Self Efficacy and Spatial Ability of Engineering Students from Multiple Disciplines. 35th ASEE Frontiers in Education Conference, October. Session S2C. 8. Study, N., (2011). Long-Term Impact of Improving Visualization Abilities of Minority Engineering and Technology Students: Preliminary results. Engineering Design Graphics Journal. 75(2), 2-8.
9. Veurink, E.L., Hamlin, A.J., Kampe, J.C., Sorby, S.A., Blasko, D.G., et.al., (2009). Enhancing Visualization Skills-Improving Options and Success (EnViSIONS) of Engineering and Technology Students. Engineering Design Graphics Journal. 73(2), 1-17. 10. Charyton, C., Jagacinski, R.J., Merrill, J.A., Clifton, W., and DeDios, S., (2011). Assessing Creativity Specific to Engineering with the Revised Creative Engineering Design Assessment. Journal of Engineering Education. 100(4), 778-799. 11. Sheppard, S.D., Macatangay, K., Colby, A. and Sullivan, W.M., (2009). Educating Engineers, Designing for the Future of the Field. The Carnegie Foundation for the Advancement of Teaching, Princeton, NJ., Jossey-Bass Publishers. 12. Bodner, G.M. and Guay, R.B., (1997) The Purdue Visualization of Rotations Test. The Chemical Educator. 2(4), 1-17. 13. Kovac, R.J., (1989). The Validation of Selected Spatial Ability Tests Via Correlational Assessment and Analysis of User-Processing Strategy. Educational Research Quarterly. 13(2), 26-34. 14. Branoff, T.J., (2000). Spatial Visualization Measurement: A Modification of the Purdue Spatial Visualization Test – Visualization of Rotations. Engineering Design Graphics Journal. 64(2), 14-22. 15. Giesecke, F.E., Mitchell, A., Spencer, H., Hill, I., Dygon, J., Novak, J. and Lockhart, S. (2012). Technical Drawing with Engineering Graphics, 14th Edition. Pearson/Prentice Hall, Columbus, Ohio. 16. Veurink. N. and Sorby, S.A., (2012). Comparison of Spatial Skills of Students Entering Different Engineering Majors. Engineering Design Graphics Journal. 76(3), 49-54. 17. Cohen, J., (1988). Statistical Power Analysis for the Behavioral Sciences, 2nd Edition. Lawrence Earlbaum Associates, Hillsdale, NJ.
Paper ID #9738
Enhance Creative Thinking by Collaborating with Designers
Dr. Yingjie Victor Chen, Purdue University, West Lafayette
Dr. Yingjie Chen is an assistant professor in the department of computer graphics technology of Pur-due university. He received his Ph.D. degree in the areas of human-computer interaction, informationvisualization, and visual analytics from the School of Interactive Arts and Technology at Simon FraserUniversity (SFU) in Canada. He earned Bachelor degree of Engineering from the Tsinghua University(China), and a Master of Science degree in Information Technology from SFU. His research covers inter-disciplinary domains of Information Visualization, Visual Analytics, Digital Media, and Human ComputerInteraction. He seeks to design, model, and construct new forms of interaction in visualization and systemdesign, by which the system can minimize its influence on design and analysis, and become a true freeextension of human’s brain and hand.