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| Criterion |  Operations A3 Problem Solving |  Operations Gemba Walk |  Decision Making Delphi Method |
|---|---|---|---|
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. | When knowledge is distributed and direct dominance should be avoided, groups quickly fall under the sway of their opinion leaders. The Delphi Method gathers assessments iteratively and gradually brings expert judgments closer together. |
Complexitydifferent | Medium | Low | High |
Timedifferent | 45-90 min | 30-120 min | 1-4 Wochen |
Participantsdifferent | 2-5 | 2-6 | 6-30 Experten |
Formatdifferent | Workshop + async | Workshop | Async |
Outputdifferent | A3 Report, Action Plan, Root Cause Analysis | Observation Notes, Improvement Ideas | Expert Forecast, Consensus Range, Assumption Notes |
Tagsno overlap | LeanProblem solvingCoachingOperations | LeanObservationProcessOperations | ForecastingExpertsDecisionStrategy |
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