Collect data during the test
You want to collect two types of data in your testing:
- Performance measurements � Two important performance measures are time (how much time callers used to complete tasks) and errors (the number and types of errors made, and where in the application they occurred).
- Opinion feedback � Important opinion measures include caller judgments about how understandable the prompts are, the ease of each task, and the overall level of satisfaction with the application.
It is very important to collect both types of data, since each gives you different information about the application. The data will be used to refine and modify the application design to meet your usability goals.
