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| Criterion |  Decision Making Three-Point Estimation |  Agile Sprint Retrospective |  Operations Gemba Walk |  Agile 4Ls Retrospective |
|---|---|---|---|---|
Purposedifferent | A single estimate for effort, time, or risk often looks too smooth for the real uncertainty behind it. It separates options, evaluation criteria, and open risks. The result is captured as a Three-Point Estimate, Risk Range, and Assumption Notes. | 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. | When there is uncertainty about the real course of a process, the method brings observation to the place where work happens. It combines perception, follow-up questions, and process knowledge so decisions rest on actual workflows instead of assumptions. | 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 | Medium | Low | Low | Low |
Timedifferent | 10-30 min je Item | Up to 3 hours for a one-month Sprint; shorter Sprints are usually shorter | 30-120 min | 45–75 min |
Participantsdifferent | 1-8 | Scrum Team | 2-6 | Team members involved |
Formatdifferent | Workshop + async | Workshop | Workshop | Workshop |
Outputdifferent | Three-Point Estimate, Risk Range, Assumption Notes | Improvement actions, Team agreements | Observation Notes, Improvement Ideas | 4Ls Board, Learning Themes, Improvement Actions |
Tagsno overlap | EstimationUncertaintyForecasting | RetrospectiveImprovementLearning | LeanObservationProcessOperations | RetrospectiveLearningReflectionTeam |