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Principles to Support Usability - Robustness

Principles to Support Usability - Robustness. Group 3 Topic 2 IM2044 Usability Engineering . Student ID: 0422902 0409543. What is it?. The level of support provided the user in determining successful achievement and assessment of goal directed behavior.

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Principles to Support Usability - Robustness

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  1. Principles to Support Usability - Robustness Group 3 Topic 2 IM2044 Usability Engineering Student ID: 0422902 0409543

  2. What is it? • The level of support provided the user in determining successful achievement and assessment of goal directed behavior. • How easy is it to evaluate whether the goals have been achieved?

  3. 4 Main principles are: Observability • Browsability; defaults; reachability; persistence; Operation visibility • Ability of user to evaluate the internal state of the system from its perceivable representation

  4. 4 Main principles are: Recoverability • Reachability; forward/backward recovery; Commensurate effort • Ability of user to take corrective action once an error has been recognized

  5. 4 Main principles are: Responsiveness • Stability • How the user perceives the rate of communication with the system

  6. 4 Main principles are: Task conformance • Task completeness; task adequacy • Degree to which system services support all of the user's tasks

  7. Examples using an Internet browser • Netscape

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