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| Criterion |  Decision Making Delphi Method |  Operations A3 Problem Solving |  Operations Barrier Analysis |  Operations Kepner-Tregoe |
|---|---|---|---|---|
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. | For a risk that can only be managed through multiple layers of protection, the method examines the effectiveness of each barrier. It shows where safeguards are missing, too weak, or fail under real conditions. | For a disturbance that's hard to pin down, the method cleanly separates problem, cause, and decision. It reduces mixing when symptoms allow several interpretations. |
Complexitydifferent | High | Medium | Medium | High |
Timedifferent | 1-4 Wochen | 45-90 min | 2-4 h | 2-8 h |
Participantsdifferent | 6-30 Experten | 2-5 | 2-6 | 2-8 |
Formatdifferent | Async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Expert Forecast, Consensus Range, Assumption Notes | A3 Report, Action Plan, Root Cause Analysis | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Problem Analysis, Decision Analysis, Risk Plan |
Tagsno overlap | ForecastingExpertsDecisionStrategy | LeanProblem solvingCoachingOperations | Root causeSafetyIncident | Problem solvingRoot causeDecisionOperations |