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| Criterion |  Operations After-Action Review |  Decision Making Three-Point Estimation |  Operations Gemba Walk |  Operations A3 Problem Solving |
|---|---|---|---|---|
Purposedifferent | After missions or project phases with unclear outcomes, the method makes visible what actually happened and what can be learned from it. It separates course, effect, and causes so experience turns into solid improvement. | 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 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. | For a complex deviation with several people involved, the method bundles problem, analysis, and decision onto one page. It creates a shared working space where causes, countermeasures, and follow-up fit together. |
Complexitydifferent | Low | Medium | Low | Medium |
Timedifferent | 20-45 min | 10-30 min je Item | 30-120 min | 45-90 min |
Participantsdifferent | 3-12 | 1-8 | 2-6 | 2-5 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Lessons learned, Action items, Event summary | Three-Point Estimate, Risk Range, Assumption Notes | Observation Notes, Improvement Ideas | A3 Report, Action Plan, Root Cause Analysis |
Tagsno overlap | LearningOperationsImprovement | EstimationUncertaintyForecasting | LeanObservationProcessOperations | LeanProblem solvingCoachingOperations |