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| Criterion |  Product Discovery Test Card |  Product Discovery Fake Door Test |  Engineering Goal Question Metric |
|---|---|---|---|
Purposedifferent | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. | When demand is still unclear, it measures interest in a feature before it is built. It separates real behavior from polite agreement and deliberately keeps build effort small. | Helps clarify technical problems, hypotheses, and next steps in concrete terms. It breaks a technical problem into testable parts. The result is captured as a GQM table and metric briefs. |
Complexitydifferent | Low | Medium | Medium |
Timedifferent | 20-35 min | 1-5 Tage | 90-180 min |
Participantsdifferent | 1-5 | Nutzertraffic | 3-6 |
Formatdifferent | Workshop + async | Async | Workshop |
Outputdifferent | Test Card with a pre-set threshold | Click Data, Interest Signal, Learning Decision | GQM Table, Metric Profiles |
Tagsno overlap | ExperimentsValidationDiscoveryHypothesis | ValidationExperimentsDemandDiscovery | MetricsMeasurementEngineeringAlignment |
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Methods with strong topical overlap with the current selection, not yet in the comparison.
