Evaluate existing system
Evaluation of an earlier version or competitor system to identify usability problems and to obtain baseline measures of usability.
- Identifies problems to be avoided in the design of the new system.
- Provides measures of effectiveness, efficiency and satisfaction which can be used as a baseline for the new system.
If resources are limited, use a simplified evaluation process such as that used to evaluate a prototype.
- Produce a list of usability problems, categorised by importance (use post-it-notes to sort the problems), and an overview of the types of problems encountered.
- Arrange a meeting with the project manager and developer to discuss how important it is to avoid each problem in the new system.
- If measures have been taken, they can be used as a baseline for the new system, and will enable the usability requirements to be refined.
Use mock ups and paper prototypes to clarify the requirements for the new system.