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| Criterion |  Engineering Goal Question Metric |  Product Discovery Smoke Test |  Growth A/B Testing |  Product Discovery Fake Door Test |
|---|---|---|---|---|
Purposedifferent | 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. | 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 two variants compete, discussions quickly decide by taste rather than effect. A/B Testing checks behavior under controlled conditions and separates real improvement from chance or expectation effects. | 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. |
Complexitydifferent | Medium | Low | High | Medium |
Timedifferent | 90-180 min | 1-5 Tage | 1-4 Wochen | 1-5 Tage |
Participantsdifferent | 3-6 | Nutzertraffic | 1-6 | Nutzertraffic |
Formatdifferent | Workshop | Async | Async | Async |
Outputdifferent | GQM Table, Metric Profiles | Interest Metrics, Conversion Signal, Learning Note | Experiment results, Decision log, Learning summary | Click Data, Interest Signal, Learning Decision |
Tagsno overlap | MetricsMeasurementEngineeringAlignment | ValidationExperimentsDemandGrowth | ExperimentsGrowthAnalyticsValidation | ValidationExperimentsDemandDiscovery |