Question; Specify a Usability Quality Scenario for the following scenario:

- We want to allow users to go back and fix errors, by undoing things they have typed or clicked on. In the runtime system, by asking to undo, they can see immediately each previous step, in succession, and thus backup to where they made the error.

For your info:

1-What is Usability?

Usability is concerned with how easy it is for the user to accomplish a desired task and the kind of user support the system provides.

Over the years, a focus on usability has shown itself to be one of the cheapest and easiest ways to improve a systems quality (or, more precisely, the users perception of quality).

2-Usability comprises the following areas:

Learning system features.

Using a system efficiently.

Minimizing the impact of errors.

Adapting the system to user needs.

Increasing confidence and satisfaction.

NOTE: THIS IS PRINCIPLE AND DESIGN ARCHUCTIRE FOR SOFTWARE

Usability General Scenario Portion of Possible Values O Scenario Source Stimulus End user, possibly in a specialized role End user tries to use a system efficiently, learn to use the system, minimize the impact of errors, adapt the system, or configure the system Runtime or configuration time Environment Artifacts Response Response System or the specific portion of the system with which the user is interacting. The system should either provide the user with the features needed or anticipate the user's needs. One or more of the following: task time, number of errors, number of tasks accomplished, user satisfaction, gain of user knowledge, ratio of successful operations to total operations, or amount of time or data lost when an error occurs Measure Usability General Scenario Portion of Possible Values O Scenario Source Stimulus End user, possibly in a specialized role End user tries to use a system efficiently, learn to use the system, minimize the impact of errors, adapt the system, or configure the system Runtime or configuration time Environment Artifacts Response Response System or the specific portion of the system with which the user is interacting. The system should either provide the user with the features needed or anticipate the user's needs. One or more of the following: task time, number of errors, number of tasks accomplished, user satisfaction, gain of user knowledge, ratio of successful operations to total operations, or amount of time or data lost when an error occurs Measure