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| Criterion |  Growth North Star Metric |  Growth Pirate Metrics AARRR |  Product Discovery Experiment Canvas |  Product Discovery Test Card |
|---|---|---|---|---|
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. | 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 experiments become unreadable after the fact, it arranges hypothesis, signal, and learning goal on a single canvas. It separates problem, assumption, solution, and evidence. The result is captured as a Completed Experiment Canvas and a Success Metric. | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. |
Complexitydifferent | Medium | Medium | Low | Low |
Timedifferent | 1-2 h | 1-2 h Setup, laufend | 30-60 min | 20-35 min |
Participantsdifferent | 3-8 | 2-8 | 1-5 | 1-5 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | North Star metric, Input metric tree, Measurement cadence | AARRR funnel, Metric baseline, Experiment backlog | Completed Experiment Canvas, Success Metric | Test Card with a pre-set threshold |
Tagsno overlap | GrowthMetricsAlignmentRetention | GrowthMetricsExperiments | ExperimentsValidationDiscoveryHypothesis | ExperimentsValidationDiscoveryHypothesis |