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| Criterion |  Engineering Goal Question Metric |  Growth Pirate Metrics AARRR |  Product Discovery Fake Door Test |  Product Discovery Smoke 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. | For products with complex usage paths, overall growth alone is too coarse to reveal bottlenecks. Pirate Metrics breaks the relationship with the product into consecutive stages and shows where the funnel actually leaks. | 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. | 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. |
Complexitydifferent | Medium | Medium | Medium | Low |
Timedifferent | 90-180 min | 1-2 h Setup, laufend | 1-5 Tage | 1-5 Tage |
Participantsdifferent | 3-6 | 2-8 | Nutzertraffic | Nutzertraffic |
Formatdifferent | Workshop | Workshop + async | Async | Async |
Outputdifferent | GQM Table, Metric Profiles | AARRR funnel, Metric baseline, Experiment backlog | Click Data, Interest Signal, Learning Decision | Interest Metrics, Conversion Signal, Learning Note |
Tagsno overlap | MetricsMeasurementEngineeringAlignment | GrowthMetricsExperiments | ValidationExperimentsDemandDiscovery | ValidationExperimentsDemandGrowth |