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| Criterion |  Agile Starfish Retrospective |  Growth A/B Testing |  Product Discovery Smoke Test |  Agile 4Ls Retrospective |
|---|---|---|---|---|
Purposedifferent | When improvement options need to be sorted more finely than just start and stop, it brings observations into clear kinds of action. This makes visible what should be done more, less, newly, or continued. | When two variants compete, discussions quickly decide by taste rather than effect. A/B Testing checks behavior under controlled conditions and separates real improvement from chance or expectation effects. | When demand only needs to be roughly verified, it tests interest with minimal effort. It measures whether people would take a next step at all. | 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 | High | Low | Low |
Timedifferent | 45-90 min | 1-4 Wochen | 1-5 Tage | 45–75 min |
Participantsdifferent | 4-12 | 1-6 | Nutzertraffic | Team members involved |
Formatdifferent | Workshop | Async | Async | Workshop |
Outputdifferent | Starfish Board, Practice Changes, Experiments | Experiment results, Decision log, Learning summary | Interest Metrics, Conversion Signal, Learning Note | 4Ls Board, Learning Themes, Improvement Actions |
Tagsno overlap | RetrospectiveImprovementExperimentsTeam | ExperimentsGrowthAnalyticsValidation | ValidationExperimentsDemandGrowth | RetrospectiveLearningReflectionTeam |