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| Criterion |  Agile 4Ls Retrospective |  Product Discovery Riskiest Assumption Test |  Agile Mad Sad Glad |  Product Discovery Fake Door Test |
|---|---|---|---|---|
Purposedifferent | 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. | When a team's or workshop's mood needs to become readable, it structures emotional signals with little setup. It makes strain, relief, and sources of energy tangible. | 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 | Medium | Low | Medium |
Timedifferent | 45–75 min | 1-2 Wochen pro Iteration | 30-60 min | 1-5 Tage |
Participantsdifferent | Team members involved | 2-6 | 3-10 | Nutzertraffic |
Formatdifferent | Workshop | Workshop + async | Workshop | Async |
Outputdifferent | 4Ls Board, Learning Themes, Improvement Actions | Prioritized Assumption List, Test Plan, Results Report | Emotion Board, Themes, Action Items | Click Data, Interest Signal, Learning Decision |
Tagsno overlap | RetrospectiveLearningReflectionTeam | ExperimentsValidationDiscoveryAssumptions | RetrospectiveTeamReflection | ValidationExperimentsDemandDiscovery |