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| Criterion |  Growth North Star Metric |  Product Discovery Smoke Test |  Growth Pirate Metrics AARRR |  Product Discovery Fake Door Test |
|---|---|---|---|---|
Purposedifferent | When product teams track many metrics, the view of the actual customer outcome easily gets lost. A North Star Metric bundles growth, usage, and value contribution into one signal that makes the system's direction visible. | 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. | 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. |
Complexitydifferent | Medium | Low | Medium | Medium |
Timedifferent | 1-2 h | 1-5 Tage | 1-2 h Setup, laufend | 1-5 Tage |
Participantsdifferent | 3-8 | Nutzertraffic | 2-8 | Nutzertraffic |
Formatdifferent | Workshop + async | Async | Workshop + async | Async |
Outputdifferent | North Star metric, Input metric tree, Measurement cadence | Interest Metrics, Conversion Signal, Learning Note | AARRR funnel, Metric baseline, Experiment backlog | Click Data, Interest Signal, Learning Decision |
Tagsno overlap | GrowthMetricsAlignmentRetention | ValidationExperimentsDemandGrowth | GrowthMetricsExperiments | ValidationExperimentsDemandDiscovery |