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| Criterion |  Growth Pirate Metrics AARRR |  UX Research Diary Study |  Product Discovery Test Card |  Product Discovery Fake Door Test |
|---|---|---|---|---|
Purposedifferent | 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 experiences build up over days or weeks and a single session cannot capture them, Diary Study records the course of everyday life. Recurring triggers, moods, and habits become visible this way, beyond the sharpness of memory. | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. | 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 | Medium | Low | Medium |
Timedifferent | 1-2 h Setup, laufend | 1-4 Wochen | 20-35 min | 1-5 Tage |
Participantsdifferent | 2-8 | 5-20 | 1-5 | Nutzertraffic |
Formatdifferent | Workshop + async | Async | Workshop + async | Async |
Outputdifferent | AARRR funnel, Metric baseline, Experiment backlog | Diary Entries, Longitudinal Patterns, Experience Timeline | Test Card with a pre-set threshold | Click Data, Interest Signal, Learning Decision |
Tagsno overlap | GrowthMetricsExperiments | UX researchTrackingBehavior | ExperimentsValidationDiscoveryHypothesis | ValidationExperimentsDemandDiscovery |