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| Criterion |  Operations Kepner-Tregoe |  Decision Making Delphi Method |  Operations Failure Mode and Effects Analysis |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | 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 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 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 | 2-8 h | 1-4 Wochen | 2-6 h | 15-30 min |
Participantsdifferent | 2-8 | 6-30 Experten | 3-10 | 2-6 |
Formatdifferent | Workshop + async | Async | Workshop | Workshop |
Outputdifferent | Problem Analysis, Decision Analysis, Risk Plan | Expert Forecast, Consensus Range, Assumption Notes | FMEA Table, Risk Priority, Mitigation Actions | Root cause notes, Countermeasures |
Tagsno overlap | Problem solvingRoot causeDecisionOperations | ForecastingExpertsDecisionStrategy | RiskQualityOperationsRoot cause | Root causeIncidentLeanProblem solving |