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| Criterion |  Operations 8D Problem Solving |  Decision Making Three-Point Estimation |  Decision Making Wideband Delphi |  Operations Root Cause Analysis |
|---|---|---|---|---|
Purposedifferent | For an acute quality or delivery problem, the method structures immediate protection and root cause work together. It keeps the situation stable while the actual cause is investigated cleanly. | A single estimate for effort, time, or risk often looks too smooth for the real uncertainty behind it. It separates options, evaluation criteria, and open risks. The result is captured as a Three-Point Estimate, Risk Range, and Assumption Notes. | 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. | When a problem keeps recurring and the cause stays unclear, the method exposes the underlying mechanism. It separates symptom, guess, and robust explanation from one another. |
Complexitydifferent | High | Medium | High | Medium |
Timedifferent | 1-6 Wochen | 10-30 min je Item | 1-4 h or multiple rounds | 1-4 h |
Participantsdifferent | 4-10 | 1-8 | 4-12 Experten | 3-8 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Three-Point Estimate, Risk Range, Assumption Notes | Estimate Range, Assumption Log, Expert Consensus Notes | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan |
Tagsno overlap | QualityProblem solvingRoot cause | EstimationUncertaintyForecasting | EstimationExpertsForecasting | Root causeProblem solvingQualityIncident |