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| Criterion |  Operations Kepner-Tregoe |  Decision Making Delphi Method |  Decision Making Wideband Delphi |  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. | A single opinion rarely holds up for planning when the future is genuinely uncertain. It separates options, evaluation criteria, and open risks. The result is captured as an Estimate Range, Assumption Log, and Expert Consensus Notes. | 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 | 1-4 h or multiple rounds | 15-30 min |
Participantsdifferent | 2-8 | 6-30 Experten | 4-12 Experten | 2-6 |
Formatdifferent | Workshop + async | Async | Workshop + async | Workshop |
Outputdifferent | Problem Analysis, Decision Analysis, Risk Plan | Expert Forecast, Consensus Range, Assumption Notes | Estimate Range, Assumption Log, Expert Consensus Notes | Root cause notes, Countermeasures |
Tagsno overlap | Problem solvingRoot causeDecisionOperations | ForecastingExpertsDecisionStrategy | EstimationExpertsForecasting | Root causeIncidentLeanProblem solving |