| Technique | Type of Information | Appropriate Use |
|---|---|---|
| Questionnaire | Subjective response to question posed. Best with specific questions. | Any time in cycle when clear questions can be posed. |
| Verbal Report | Record of cognitive processes in system use. | Early in cycle when general information is desired |
| Controlled Experiments | Specific measures in a controlled setting. | For specific tests of major alternatives or hypothesis. |
| Design Review | Common sense review of design to check for general acceptability. | Early in design cycle to filter early decisions. |
| Formal Analysis (GOMS) | Predictions of expert user behavior | Use in place of user testing for ease of use predictions. |
| Production System Analysis | Predictions of learning, use, and transfer behavior | Use to supplement other analysis data. |