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| Criterion |  Operations A3 Problem Solving |  Operations Gemba Walk |  Systems Thinking Evaporating Cloud |  Operations Kaizen Event |
|---|---|---|---|---|
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. | 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. | The method makes visible why two seemingly incompatible demands arise and which assumption must be tested to resolve the conflict. | For a tightly scoped process segment with noticeable waste, the method bundles shared energy for change. It suits situations that call for fast learning loops and visible adjustments. |
Complexitydifferent | Medium | Low | Medium | Medium |
Timedifferent | 45-90 min | 30-120 min | 60-120 min | 0.5-5 Tage |
Participantsdifferent | 2-5 | 2-6 | 2-8 | 4-10 |
Formatdifferent | Workshop + async | Workshop | Workshop | Workshop |
Outputdifferent | A3 Report, Action Plan, Root Cause Analysis | Observation Notes, Improvement Ideas | Conflict Cloud, Assumption List, Breakthrough Ideas, Next Experiments | Kaizen Charter, Waste List, Improvement Experiments, Standard Work Update |
Tagsno overlap | LeanProblem solvingCoachingOperations | LeanObservationProcessOperations | Theory of ConstraintsAssumptionsSystems thinking | LeanContinuous improvementOperations |