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| Criterion |  Decision Making Delphi Method |  Operations Fishbone Diagram |  Operations Kepner-Tregoe |  Operations 5 Whys |
|---|---|---|---|---|
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 a problem has several possible contributing factors, the method sorts causes by cause areas. It prevents an initial hunch from blocking the view of other plausible drivers. | For a disturbance that's hard to pin down, the method cleanly separates problem, cause, and decision. It reduces mixing when symptoms allow several interpretations. | For a single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description. |
Complexitydifferent | High | Low | High | Low |
Timedifferent | 1-4 Wochen | 30-60 min | 2-8 h | 15-30 min |
Participantsdifferent | 6-30 Experten | 2-8 | 2-8 | 2-6 |
Formatdifferent | Async | Workshop | Workshop + async | Workshop |
Outputdifferent | Expert Forecast, Consensus Range, Assumption Notes | Fishbone Diagram, Cause Categories, Investigation Backlog | Problem Analysis, Decision Analysis, Risk Plan | Root cause notes, Countermeasures |
Tagsno overlap | ForecastingExpertsDecisionStrategy | Root causeQualityOperations | Problem solvingRoot causeDecisionOperations | Root causeIncidentLeanProblem solving |