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| Criterion |  Decision Making Delphi Method |  Operations Gemba Walk |  Facilitation 3-Circle Venn Diagram |  Operations A3 Problem Solving |
|---|---|---|---|---|
Purposedifferent | 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. | 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 three perspectives matter at the same time, a Three-Circle Venn Diagram shows the overlaps and remainders precisely. It makes visible where shared effect arises and where only a partial perspective applies. | 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. |
Complexitydifferent | High | Low | Low | Medium |
Timedifferent | 1-4 Wochen | 30-120 min | 15-45 min | 45-90 min |
Participantsdifferent | 6-30 Experten | 2-6 | 2-8 | 2-5 |
Formatdifferent | Async | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Expert Forecast, Consensus Range, Assumption Notes | Observation Notes, Improvement Ideas | Venn Diagram, Overlap Notes, Differentiators | A3 Report, Action Plan, Root Cause Analysis |
Tagsno overlap | ForecastingExpertsDecisionStrategy | LeanObservationProcessOperations | ComparisonFacilitationAlignment | LeanProblem solvingCoachingOperations |