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| Criterion |  Decision Making Delphi Method |  Operations A3 Problem Solving |  Decision Making Decision Matrix |  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 a complex deviation with several people involved, the method bundles problem, analysis, and decision onto one page. It creates a shared working space where causes, countermeasures, and follow-up fit together. | When several options collide with several criteria, comparison quickly becomes subjective. A Decision Matrix makes the trade-off visible and brings weighting, criteria, and options into a shared logic. | 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 | Medium | Medium | Low |
Timedifferent | 1-4 Wochen | 45-90 min | 45-90 min | 15-30 min |
Participantsdifferent | 6-30 Experten | 2-5 | 2-8 | 2-6 |
Formatdifferent | Async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Expert Forecast, Consensus Range, Assumption Notes | A3 Report, Action Plan, Root Cause Analysis | Decision Matrix, Scoring Rationale, Selected Option | Root cause notes, Countermeasures |
Tagsno overlap | ForecastingExpertsDecisionStrategy | LeanProblem solvingCoachingOperations | DecisionCriteriaScoringTradeoffs | Root causeIncidentLeanProblem solving |