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| Criterion |  Decision Making Delphi Method |  Operations Kepner-Tregoe |  Operations Failure Mode and Effects Analysis |  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. | For a process, product, or service with noticeable failure risks, the method assesses possible failure modes in advance. It directs attention to combinations of occurrence, effect, and detectability. | 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 | High | Low |
Timedifferent | 1-4 Wochen | 2-8 h | 2-6 h | 15-30 min |
Participantsdifferent | 6-30 Experten | 2-8 | 3-10 | 2-6 |
Formatdifferent | Async | Workshop + async | Workshop | Workshop |
Outputdifferent | Expert Forecast, Consensus Range, Assumption Notes | Problem Analysis, Decision Analysis, Risk Plan | FMEA Table, Risk Priority, Mitigation Actions | Root cause notes, Countermeasures |
Tagsno overlap | ForecastingExpertsDecisionStrategy | Problem solvingRoot causeDecisionOperations | RiskQualityOperationsRoot cause | Root causeIncidentLeanProblem solving |