Computers Are Ubiquitous The Importance of Good User Interface Design ◦ What Is a Good User Interface Design? What Is Usability? UIDE Chapter 1.

Chapter 1

IntroducingUser Interface Design

UIDE Chapter 1

Computers Are Ubiquitous

The Importance of Good User Interface Design◦ What Is a Good User Interface Design?

What Is Usability?

Why the User Interface Matters

UIDE Chapter 1

Software Attributes

Usability: (ISO 9241) “the extent to which a product can be used by specified

users to achieve specified goals with effectiveness, efficiency and satisfaction in a specified context of use.”

Effectiveness: “the accuracy and completeness with which users can

achieve goals in particular environments” Efficiency: “the resources expended in relation to the accuracy and

completeness of the goals achieved” Satisfaction” “the comfort and acceptability of the work system to its

users and other people affected by its use”

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◦User Frustration and Dissatisfaction

◦ This is Broken, Ask Tog, Safety and the User Interface Elections and the User Interface

◦ Butterfly Ballot

◦Small Irritations Are Also

a Problem

The Problems of Poor or Bad User Interfaces

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Human-Centered Design (HCD) Principles◦ Active involvement of users◦ Allocation of function between user and system◦ Iteration of design solutions◦ Multidisciplinary design teams

4 Essential HCD Activities1. Understand and specify the context of use2. Specify the user and organizational

requirements3. Produce design solutions (prototypes)4. Evaluate designs with users against

requirements

Designing for Users

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To know the user, obtain characteristics from the USER, the TASK, and the ENVIRONMENT ◦Personal User Information◦Knowledge and Experience◦Personal Preferences and Traits◦Task Information◦Job Characteristics◦User Constraints◦Environment Information

Know THY User

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1. Atlanta Zoo: One of your executives is on the Board of Directors of the Atlanta zoo. Recognizing your expertise in user-centered design, she has asked you to do some pro-bono work for a zoo kiosk to provide directions at the zoo.

2. Defensive-Driver Education: One of your executives is on the local safety committee. Recognizing your expertise in user-centered design, he has asked you to do some pro-bono work for a multimedia training application to provide instruction on defensive driving.

3. Multiplication Tables for 3rd Graders: One of your executives is on the Board of Advisors of the local school. Recognizing your expertise in user-centered design, she has asked you to do a training application to assist 3rd graders in learning multiplication tables.

4. Welcome Center for the Olympics 2016: Your group has been asked to create a welcome center for all the attendees and participants to the Olympics 2016 in Rio de Janeiro.

5. Call Center for IKEA: Your group has been commission to create a call center guide for all the text help requests. This is different from the phone calls for help and internet help – instead the user is only using text messages.

6. Senior Citizen assisted email: One of your executives has parents in a senior citizen living facility. He would like you to develop an assisted email system that is tailored for all the residents of the facility.

7. No More Pennies: The government has commission your group to create a website to advise the public that in 2020 we will not be using pennies. All pricing will be base5.

Group Instructions: Develop a User Profile for the following scenarios by thinking about which of the checklist items affect your scenario below. Circle the important ones and then write up a draft description of the user’s important personal characteristics, task characteristics, and environmental characteristics. Who is your user? Describe them.

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User-Centered Design

The Classic Life Cycle

Involving Users

Who Are the Users?

Making the Design Process Iterative

When and How to Involve Users

Designing for Users

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The Classic Life Cycle for Software Development

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Interface Design and Evaluation Process

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Stakeholders◦ Payers, administration, developers, end-users

Users◦ Users of the computer system

External Related User◦ Manager, Administrators of external systems

Stakeholders –vs- Users

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Evaluation-centered

Star Life Cycle

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1. Information-gathering and analyses that form part of the user interface design and development process

2. User interface

design knowledge

(i.e. design

principles,

design rules)

The Two Types of Knowledge Needed for UI Design

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◦ When and How Do You Evaluate?

Evaluation Early in the Life Cycle

Evaluation Later in the Life Cycle

How Do You Evaluate?

Observing the organization and how people work

Interviewing, talking, and asking questions

Making predictions

Evaluation