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| Criterion |  Operations 5 Whys |  Decision Making Delphi Method |  Operations Barrier Analysis |  Operations MORT Analysis |
|---|---|---|---|---|
Purposedifferent | 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. | 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 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 safety-relevant event or a system with high protection requirements, the method examines where controls failed. It exposes both technical and organizational gaps. |
Complexitydifferent | Low | High | Medium | High |
Timedifferent | 15-30 min | 1-4 Wochen | 2-4 h | Mehrere Tage bis Wochen |
Participantsdifferent | 2-6 | 6-30 Experten | 2-6 | 2-6 |
Formatdifferent | Workshop | Async | Workshop + async | Workshop + async |
Outputdifferent | Root cause notes, Countermeasures | Expert Forecast, Consensus Range, Assumption Notes | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | MORT Worksheets, Findings per Branch, Corrective Actions, Systemic Recommendations |
Tagsno overlap | Root causeIncidentLeanProblem solving | ForecastingExpertsDecisionStrategy | Root causeSafetyIncident | Root causeSafetySystemicIncident |