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| Criterion |  Product Discovery Fake Door Test |  Product Discovery Learning Card |  Agile 4Ls Retrospective |
|---|---|---|---|
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. | The Learning Card connects traceable test results to a reasoned next action while keeping the limits of the insight visible. | When a sprint should not only be assessed but also learned from, it captures experience in clear learning categories. It records what worked, what's missing, and what should run differently next time. |
Complexitydifferent | Medium | Low | Low |
Timedifferent | 1-5 Tage | 25-40 min | 45–75 min |
Participantsdifferent | Nutzertraffic | 1-5 | Team members involved |
Formatdifferent | Async | Workshop + async | Workshop |
Outputdifferent | Click Data, Interest Signal, Learning Decision | Learning Card with evidence and next action | 4Ls Board, Learning Themes, Improvement Actions |
Tagsno overlap | ValidationExperimentsDemandDiscovery | ExperimentsValidationDiscoveryLearning | RetrospectiveLearningReflectionTeam |
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