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| Criterion |  Agile Sprint Retrospective |  Product Discovery Test Card |  Product Discovery Fake Door Test |
|---|---|---|---|
Purposedifferent | When a sprint is over and friction shouldn't simply be carried forward, it opens the view onto collaboration and patterns. It creates space to see causes and changes together. | 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. |
Complexitydifferent | Low | Low | Medium |
Timedifferent | Up to 3 hours for a one-month Sprint; shorter Sprints are usually shorter | 20-35 min | 1-5 Tage |
Participantsdifferent | Scrum Team | 1-5 | Nutzertraffic |
Formatdifferent | Workshop | Workshop + async | Async |
Outputdifferent | Improvement actions, Team agreements | Test Card with a pre-set threshold | Click Data, Interest Signal, Learning Decision |
Tagsno overlap | RetrospectiveImprovementLearning | ExperimentsValidationDiscoveryHypothesis | ValidationExperimentsDemandDiscovery |
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