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| Criterion |  Agile Start Stop Continue |  Product Discovery Test Card |  Product Discovery Fake Door Test |  Agile 4Ls Retrospective |
|---|---|---|---|---|
Purposedifferent | When a team wants to deliberately adjust its working behavior, it makes habits visible and assessable. It focuses on concrete changes instead of diffuse mood. | 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. | 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 | Low | Low | Medium | Low |
Timedifferent | 30-60 min | 20-35 min | 1-5 Tage | 45–75 min |
Participantsdifferent | 3-12 | 1-5 | Nutzertraffic | Team members involved |
Formatdifferent | Workshop | Workshop + async | Async | Workshop |
Outputdifferent | Start Stop Continue Board, Improvement Actions | Test Card with a pre-set threshold | Click Data, Interest Signal, Learning Decision | 4Ls Board, Learning Themes, Improvement Actions |
Tagsno overlap | RetrospectiveImprovementTeamReflection | ExperimentsValidationDiscoveryHypothesis | ValidationExperimentsDemandDiscovery | RetrospectiveLearningReflectionTeam |