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| Criterion |  Decision Making Delphi Method |  Operations 5 Whys |  Decision Making Decision Rights Mapping |  Operations 8D Problem Solving |
|---|---|---|---|---|
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 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. | In organizations with many stakeholders, it often blurs who actually decides and who is merely consulted. It separates options, evaluation criteria, and open risks. The result is captured as a Decision Rights matrix and an agreement. | 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. |
Complexitydifferent | High | Low | Medium | High |
Timedifferent | 1-4 Wochen | 15-30 min | 90-180 min | 1-6 Wochen |
Participantsdifferent | 6-30 Experten | 2-6 | 4-12 | 4-10 |
Formatdifferent | Async | Workshop | Workshop | Workshop + async |
Outputdifferent | Expert Forecast, Consensus Range, Assumption Notes | Root cause notes, Countermeasures | Decision Rights Matrix, Agreement | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan |
Tagsno overlap | ForecastingExpertsDecisionStrategy | Root causeIncidentLeanProblem solving | DecisionGovernanceAlignmentResponsibility | QualityProblem solvingRoot cause |