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| Criterion |  Decision Making Delphi Method |  Engineering Fault Isolation |  Facilitation 3-Circle Venn Diagram |  Operations Change Analysis |
|---|---|---|---|---|
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. | In technical failures, the visible symptom often gets mixed up with the actual cause. Fault Isolation narrows the fault space and progressively reduces which part of the system is truly affected. | 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 deviation after a change, the method isolates the influence of the altered condition. It narrows down which differences are relevant and which are just accompanying noise. |
Complexitydifferent | High | Medium | Low | Medium |
Timedifferent | 1-4 Wochen | 30-180 min | 15-45 min | 45-120 min |
Participantsdifferent | 6-30 Experten | 1-6 | 2-8 | 2-6 |
Formatdifferent | Async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Expert Forecast, Consensus Range, Assumption Notes | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area | Venn Diagram, Overlap Notes, Differentiators | Change Matrix, Cause Hypotheses, Validation Questions, Action List |
Tagsno overlap | ForecastingExpertsDecisionStrategy | TroubleshootingDiagnosisEngineering | ComparisonFacilitationAlignment | ChangeRoot causeTroubleshootingComparison |