1. Chapter 1 Introducing User Interface Design

2. UIDE Chapter 1 Why the User Interface Matters Why the User Interface Matters Computers Are Ubiquitous Computers Are Ubiquitous The Importance of Good User Interface Design The Importance of Good User Interface Design –What Is a Good User Interface Design? What Is Usability? What Is Usability?

3. UIDE Chapter 1 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”

4. UIDE Chapter 1 The Problems of Poor or Bad User Interfaces The Problems of Poor or Bad User Interfaces –User Frustration and Dissatisfaction –This is Broken, Ask Tog, This is BrokenAsk TogThis is BrokenAsk Tog Safety and the User Interface Safety and the User Interface Elections and the User Interface Elections and the User Interface –Butterfly Ballot Butterfly BallotButterfly Ballot –Small Irritations Are Also a Problem

5. UIDE Chapter 1 Links: Links: Man Shoots Computer Man Shoots Computer Rage Computer Rage Computer Rage-2 Computer Rage-2 Wikipedia Definition Wikipedia Definition Cartoon

6. UIDE Chapter 1 Designing for Users Human-Centered Design (HCD) Principles Human-Centered Design (HCD) Principles –Active involvement of users –Allocation of function between user and system –Iteration of design solutions –Multidisciplinary design teams

7. UIDE Chapter 1 4 Essential HCD Activities 4 Essential HCD Activities –Understand and specify the context of use –Specify the user and organizational requirements –Produce design solutions (prototypes) –Evaluate designs with users against requirements Designing for Users

8. UIDE Chapter 1 Designing for Users Designing for Users –User-Centered Design –The Classic Life Cycle –Involving Users Who Are the Users? Who Are the Users? –Making the Design Process Iterative When and How to Involve Users When and How to Involve Users

9. UIDE Chapter 1 The Classic Life Cycle for Software Development

10. UIDE Chapter 1 Interface Design and Evaluation Process

11. UIDE Chapter 1 Stakeholders –vs- Users Stakeholders Stakeholders –Payers, administration, developers, endusers Users Users –Users of the computer system

12. UIDE Chapter 1 Star Life Cycle Evaluation-centered Evaluation-centered

13. UIDE Chapter 1 The Two Types of Knowledge Needed for UI Design The Two Types of Knowledge Needed for UI Design 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)

14. UIDE Chapter 1 Evaluation –When and How Do You Evaluate? Evaluation Early in the Life Cycle Evaluation Early in the Life Cycle Evaluation Later in the Life Cycle Evaluation Later in the Life Cycle How Do You Evaluate? How Do You Evaluate? –Observing the organization and how people work –Interviewing, talking, and asking questions –Making predictions