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| Criterion |  Decision Making Delphi Method |  Operations 8D Problem Solving |  Product Strategy DIBB |  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 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. | DIBB helps clarify target groups, value, goals, and priorities by making the logic behind a decision explicit. It captures results as a DIBB document, belief list, bet list, and learning report. | 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 | Low | Low |
Timedifferent | 1-4 Wochen | 1-6 Wochen | 1-2 h | 15-30 min |
Participantsdifferent | 6-30 Experten | 4-10 | 2-8 | 2-6 |
Formatdifferent | Async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Expert Forecast, Consensus Range, Assumption Notes | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | DIBB document, Belief list, Bet list, Learning report | Root cause notes, Countermeasures |
Tagsno overlap | ForecastingExpertsDecisionStrategy | QualityProblem solvingRoot cause | StrategyDecisionAssumptionsHypothesis | Root causeIncidentLeanProblem solving |