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| Criterion |  Operations A3 Problem Solving |  Decision Making Wideband Delphi |  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. | A single opinion rarely holds up for planning when the future is genuinely uncertain. It separates options, evaluation criteria, and open risks. The result is captured as an Estimate Range, Assumption Log, and Expert Consensus 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. |
Complexitydifferent | Medium | High | Low |
Timedifferent | 45-90 min | 1-4 h or multiple rounds | 30-120 min |
Participantsdifferent | 2-5 | 4-12 Experten | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop |
Outputdifferent | A3 Report, Action Plan, Root Cause Analysis | Estimate Range, Assumption Log, Expert Consensus Notes | Observation Notes, Improvement Ideas |
Tagsno overlap | LeanProblem solvingCoachingOperations | EstimationExpertsForecasting | LeanObservationProcessOperations |
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