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| Criterion |  Operations After-Action Review |  Knowledge Modeling Feynman Technique |  Operations A3 Problem Solving |  Operations Gemba Walk |
|---|---|---|---|---|
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. | The Feynman Technique checks understanding by explaining a topic so that it stays easy for others to understand. It makes knowledge gaps visible before they become costly in everyday work. | 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. | 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. |
Complexitydifferent | Low | Low | Medium | Low |
Timedifferent | 20-45 min | 20-60 min | 45-90 min | 30-120 min |
Participantsdifferent | 3-12 | 1 | 2-5 | 2-6 |
Formatdifferent | Workshop + async | Async | Workshop + async | Workshop |
Outputdifferent | Lessons learned, Action items, Event summary | Plain-language Explanation, Knowledge Gaps, Study Notes | A3 Report, Action Plan, Root Cause Analysis | Observation Notes, Improvement Ideas |
Tagsno overlap | LearningOperationsImprovement | LearningKnowledgeUnderstanding | LeanProblem solvingCoachingOperations | LeanObservationProcessOperations |