PowerPoint Presentation for Dennis & Haley Wixom, Systems Analysis and Design Copyright 2000 © John Wiley & Sons, Inc. All rights reserved. Slide 1 Systems.

PowerPoint Presentation for Dennis & Haley Wixom, Systems Analysis and Design

Copyright 2000 © John Wiley & Sons, Inc. All rights reserved.Slide 1

Systems Analysis Systems Analysis and Designand Design

Alan Dennis and Barbara Haley WixomJohn Wiley & Sons, Inc.

Slides by Fred Niederman



Copyright © 2000 John Wiley & Sons, Inc.

All rights reserved. Reproduction or translation of this work beyond that permitted in Section 117 of the 1976 United States Copyright Act without the express written permission of the copyright owner is unlawful. Request for further information should be addressed to the Permissions Department, John Wiley & Sons, Inc. The purchaser may make back-up copies for his/her own use only and not for redistribution or resale. The Publisher assumes no responsibility for errors, omissions, or damages, caused by the use of these programs or from the use of the information contained herein.



User Interface Structure Design

Chapter 10



Key Definitions

The user interface defines how the system will interact with external entitiesThe system interfaces define how systems exchange information with other systems



Key Definitions

The navigation mechanism provides the way for users to tell the system what to doThe input mechanism defines the way the system captures informationThe output mechanism defines the way the system provides information to users or other systems



Principles For User Interface Design



Principles for User Interface Design

LayoutContent awarenessAestheticsUser experienceConsistencyMinimal user effort



Layout Concepts

The screen is often divided into three boxes

Navigation area (top)Status area (bottom)Work area (middle)

Information can be presented in multiple areasLike areas should be grouped together



More Layout Concepts

Areas and information should minimize user movement from one to anotherIdeally, areas will remain consistent in

SizeShapePlacement for entering dataReports presenting retrieved data



Layout Example 1



Layout Example 2



Layout Example 3



Content Awareness

All interfaces should have titlesMenus should show

where you arewhere you came from to get there

It should be clear what information is within each areaFields and field labels should be selected carefullyUse dates and version numbers to aid system users



Aesthetics

Interfaces need to be functional and inviting to useAvoid squeezing in too much, particularly for novice usersDesign text carefully

Be aware of font and sizeAvoid using all capital letters



More Aesthetics

Colors and patterns should be used carefully

Test quality of colors by trying the interface on a black/white monitorUse colors to separate or categorize items



User Experience

How easy is the program to learn?How easy is the program to use for the expert?Consider adding shortcuts for the expertWhere there is low employee turnover, some training can lessen the impact of less precise interfaces



Consistency

Enables users to predict what will happenReduces learning curveConsiders items within an application and across applicationsPertains to many different levels

Navigation controlsTerminologyReport and form design



Minimize Effort

Three clicks ruleUsers should be able to go from the start or main menu of a system to the information or action they want in no more than three mouse clicks or three keystrokes



User Interface Design Process



Five Step Process



Use Scenario Development

An outline of steps to perform workPresented in a simple narrative tied to the related DFDDocument the most common cases so interface designs will be easy to use for those situations



Your Turn

Visit the Web site for your university and navigate through several of its Web pages.Develop two use scenarios for it.



Interface Structure Diagram

Shows how all screens, forms, and reports are relatedShows how user moves from one to anotherSimilar to DFD in using boxes and linesDifferent from DFD in having no standard rules or formatBoxes denote screensLines show movement from one to another



Interface Structure Diagram Example



Interface Standards Design

The basic elements that are common across individual screens, forms, and reports within the applicationInterface metaphor

Desktop, checkbook, shopping cartInterface objectsInterface actionsInterface iconsInterface templates



Interface Design Prototyping

A mock-up or simulation of screen, form, or reportCommon methods include

PaperStoryboardingHTMLLanguage



Storyboard Example



Interface Evaluation Methods

Heuristic evaluationCompare design to checklist

Walkthrough evaluationTeam simulates movement through components

Interactive evaluationUsers try out the system

Formal usability testingExpensiveDetailed use of special lab testing


Copyright 2000 © John Wiley & Sons, Inc. All rights reserved.


Copyright 2000 © John Wiley & Sons, Inc. All rights reserved.



SummaryThe user interface should be designed to make the user’s work easier and more effective.Principles for good interface design include concern for content and context for navigation through activities, aesthetic consideration, assistance for novices and experts, consistency, and minimizing user effort.The design process focuses on user actions, diagramming the structure, setting up standards and a template, then evaluating interface designs.

PowerPoint Presentation for Dennis & Haley Wixom, Systems Analysis and Design Copyright 2000 © John Wiley & Sons, Inc. All rights reserved. Slide 1 Systems.

Documents

design copyright

systems analysis

dennis haley wixom

user interface design

powerpoint presentation

design alan dennis

systems exchange information

retrieved data slide