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| Criterion |  Product Discovery Smoke Test |  Product Discovery Fake Door Test |  Engineering Goal Question Metric |
|---|---|---|---|
Purposedifferent | When demand only needs to be roughly verified, it tests interest with minimal effort. It measures whether people would take a next step at all. | 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 | 1-5 Tage | 1-5 Tage | 90-180 min |
Participantsdifferent | Nutzertraffic | Nutzertraffic | 3-6 |
Formatdifferent | Async | Async | Workshop |
Outputdifferent | Interest Metrics, Conversion Signal, Learning Note | Click Data, Interest Signal, Learning Decision | GQM Table, Metric Profiles |
Tagsno overlap | ValidationExperimentsDemandGrowth | ValidationExperimentsDemandDiscovery | MetricsMeasurementEngineeringAlignment |
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