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| Criterion |  Agile 4Ls Retrospective |  Product Discovery MVP Test Matrix |  Product Discovery Assumption Mapping |  Decision Making Assumption Surfacing |
|---|---|---|---|---|
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 several minimal variants compete to answer the same question, it makes comparing and choosing between them cleaner. It separates problem, assumption, solution, and evidence. The result is captured as a Test Matrix and a Test Plan. | When assumptions still sit unordered in the room, it weighs uncertainty against leverage. It makes visible which hypotheses should be checked first. | Plans often contain assumptions that were never openly stated and remain dangerous precisely because of that. Assumption Surfacing makes these silent premises visible and prioritizes which of them carry the initiative or could sink it. |
Complexitydifferent | Low | Medium | Medium | Low |
Timedifferent | 45–75 min | 45-75 min | 45-60 min | 45-90 min |
Participantsdifferent | Team members involved | 2-8 | 2-8 | 2-8 |
Formatdifferent | Workshop | Workshop | Workshop + async | Workshop + async |
Outputdifferent | 4Ls Board, Learning Themes, Improvement Actions | Test Matrix, Test Plan | Assumption map, Test backlog, Risk ranking | Assumption List, Critical Assumptions, Learning Plan |
Tagsno overlap | RetrospectiveLearningReflectionTeam | ExperimentsValidationDiscoveryOptions | AssumptionsRiskExperimentsValidation | AssumptionsRiskDecisionDiscovery |