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| Criterion |  Operations A3 Problem Solving |  Decision Making Three-Point Estimation |  Decision Making Delphi Method |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | 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. | 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. | 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. |
Complexitydifferent | Medium | Medium | High | Low |
Timedifferent | 45-90 min | 10-30 min je Item | 1-4 Wochen | 15-30 min |
Participantsdifferent | 2-5 | 1-8 | 6-30 Experten | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Async | Workshop |
Outputdifferent | A3 Report, Action Plan, Root Cause Analysis | Three-Point Estimate, Risk Range, Assumption Notes | Expert Forecast, Consensus Range, Assumption Notes | Root cause notes, Countermeasures |
Tagsno overlap | LeanProblem solvingCoachingOperations | EstimationUncertaintyForecasting | ForecastingExpertsDecisionStrategy | Root causeIncidentLeanProblem solving |