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| Criterion |  Decision Making Delphi Method |  Operations Kepner-Tregoe |  Operations Fishbone Diagram |  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. | 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. | 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 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 | High | Low | Low |
Timedifferent | 1-4 Wochen | 2-8 h | 30-60 min | 15-30 min |
Participantsdifferent | 6-30 Experten | 2-8 | 2-8 | 2-6 |
Formatdifferent | Async | Workshop + async | Workshop | Workshop |
Outputdifferent | Expert Forecast, Consensus Range, Assumption Notes | Problem Analysis, Decision Analysis, Risk Plan | Fishbone Diagram, Cause Categories, Investigation Backlog | Root cause notes, Countermeasures |
Tagsno overlap | ForecastingExpertsDecisionStrategy | Problem solvingRoot causeDecisionOperations | Root causeQualityOperations | Root causeIncidentLeanProblem solving |