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| Criterion |  Operations DMAIC |  Decision Making Delphi Method |  Operations Kepner-Tregoe |  Operations Fishbone Diagram |
|---|---|---|---|---|
Purposedifferent | For a process problem with fluctuating performance, the method brings analysis and improvement into a disciplined sequence. It creates a framework in which numbers, causes, and control come together. | 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. |
Complexitydifferent | High | High | High | Low |
Timedifferent | 2-12 Wochen | 1-4 Wochen | 2-8 h | 30-60 min |
Participantsdifferent | 3-10 | 6-30 Experten | 2-8 | 2-8 |
Formatdifferent | Workshop + async | Async | Workshop + async | Workshop |
Outputdifferent | Project Charter, Measurement Plan, Cause Analysis, Control Plan | Expert Forecast, Consensus Range, Assumption Notes | Problem Analysis, Decision Analysis, Risk Plan | Fishbone Diagram, Cause Categories, Investigation Backlog |
Tagsno overlap | Continuous improvementQualityProcess improvement | ForecastingExpertsDecisionStrategy | Problem solvingRoot causeDecisionOperations | Root causeQualityOperations |