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| Criterion |  Product Discovery Fake Door Test |  Agile 4Ls Retrospective |  Product Discovery Riskiest Assumption Test |
|---|---|---|---|
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 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. | When an idea hinges on one critical unknown, it prioritizes testing that exact piece of uncertainty first. It separates problem, assumption, solution, and evidence. The result is captured as a prioritized list of assumptions, a test plan, and a result report. |
Complexitydifferent | Medium | Low | Medium |
Timedifferent | 1-5 Tage | 45–75 min | 1-2 Wochen pro Iteration |
Participantsdifferent | Nutzertraffic | Team members involved | 2-6 |
Formatdifferent | Async | Workshop | Workshop + async |
Outputdifferent | Click Data, Interest Signal, Learning Decision | 4Ls Board, Learning Themes, Improvement Actions | Prioritized Assumption List, Test Plan, Results Report |
Tagsno overlap | ValidationExperimentsDemandDiscovery | RetrospectiveLearningReflectionTeam | ExperimentsValidationDiscoveryAssumptions |
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