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| Criterion |  Product Discovery Fake Door Test |  Growth North Star Metric |
|---|---|---|
Purposedifferent | 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 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. |
Complexitysame | Medium | Medium |
Timedifferent | 1-5 Tage | 1-2 h |
Participantsdifferent | Nutzertraffic | 3-8 |
Formatdifferent | Async | Workshop + async |
Outputdifferent | Click Data, Interest Signal, Learning Decision | North Star metric, Input metric tree, Measurement cadence |
Tagsno overlap | ValidationExperimentsDemandDiscovery | GrowthMetricsAlignmentRetention |
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