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| Criterion |  Operations After-Action Review |  Architecture Architecture Decision Record |  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. | An ADR permanently records an architecture decision with context, trade-offs, and consequence. It creates continuity for later changes because the decision path stays traceable. | 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. |
Complexitysame | Low | Low | Low |
Timedifferent | 20-45 min | 15-45 min | 30-120 min |
Participantsdifferent | 3-12 | 1-3 | 2-6 |
Formatdifferent | Workshop + async | Async | Workshop |
Outputdifferent | Lessons learned, Action items, Event summary | ADR File, Decision Log, Rationale | Observation Notes, Improvement Ideas |
Tagsno overlap | LearningOperationsImprovement | ArchitectureRationaleDocumentationGovernance | LeanObservationProcessOperations |
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