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| Criterion |  Decision Making Delphi Method |  Operations Root Cause Analysis |  Operations MORT Analysis |  Operations Family Tree Analysis |
|---|---|---|---|---|
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. | When a problem keeps recurring and the cause stays unclear, the method exposes the underlying mechanism. It separates symptom, guess, and robust explanation from one another. | For a safety-relevant event or a system with high protection requirements, the method examines where controls failed. It exposes both technical and organizational gaps. | For a series of incidents with a similar pattern, the method arranges individual events as branches of a common origin. It makes visible which conditions keep recurring. |
Complexitydifferent | High | Medium | High | Medium |
Timedifferent | 1-4 Wochen | 1-4 h | Mehrere Tage bis Wochen | 2-4 h |
Participantsdifferent | 6-30 Experten | 3-8 | 2-6 | 2-6 |
Formatdifferent | Async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Expert Forecast, Consensus Range, Assumption Notes | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan | MORT Worksheets, Findings per Branch, Corrective Actions, Systemic Recommendations | Family Tree Diagram, Pattern Notes, Systemic Measures |
Tagsno overlap | ForecastingExpertsDecisionStrategy | Root causeProblem solvingQualityIncident | Root causeSafetySystemicIncident | Root causePatternsIncidentSystemic |