2. What Do We Mean by
‘‘Usable’’?
• Usefulness
• Efficiency
• Effectiveness
• Learnability
• Satisfaction
• Accessibility
3. What is make something
less usable?
• Development focuses on the machine or system.
• Target audiences change and adapt.
• Designing usable products is difficult.
• Team specialists don’t always work in integrated ways.
• Design and implementation don’t always match.
4. Development Focuses on
the Machine or System
somebody (human); 33%
something (activity);
33%
some place(context);
33%
7. What Makes Products
More Usable?
• An Early Focus on Users and Tasks
• Evaluation and Measurement of Product Usage
• Iterative Design and Testing
8. What Are Techniques for
Building in Usability?
• Ethnographic Research
• Participatory Design
• Focus Group Research
• Surveys
• Paper Prototyping
• Expert or Heuristic Evaluations
• Usability Testing
9. What is usability?
The effectiveness,efficiency and satisfaction with
which specified users achieve specified goals in
particular environments.
