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| Criterion |  Operations A3 Problem Solving |  Operations Process Mapping |  Operations After-Action Review |  Operations Gemba Walk |
|---|---|---|---|---|
Purposedifferent | 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. | With a confusing workflow that has many handoffs, the method makes the actual process visible. It shows where work is passed on, delayed, or duplicated, so improvement targets the right spots. | 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. | 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 | Medium | Medium | Low | Low |
Timedifferent | 45-90 min | 1-3 h | 20-45 min | 30-120 min |
Participantsdifferent | 2-5 | 3-10 | 3-12 | 2-6 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop |
Outputdifferent | A3 Report, Action Plan, Root Cause Analysis | Process Map, Handoff List, Improvement Backlog | Lessons learned, Action items, Event summary | Observation Notes, Improvement Ideas |
Tags1 shared | LeanProblem solvingCoachingOperations | ProcessOperationsImprovement | LearningOperationsImprovement | LeanObservationProcessOperations |