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| Criterion |  Decision Making Delphi Method |  DevOps Blameless Postmortem |  Operations MORT Analysis |  Operations Barrier 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. | After an incident with damage or a near miss, the method creates a sober field for learning without assigning blame. It directs attention to the course of events, conditions, and effective countermeasures. | 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 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. |
Complexitydifferent | High | Medium | High | Medium |
Timedifferent | 1-4 Wochen | 30-90 min | Mehrere Tage bis Wochen | 2-4 h |
Participantsdifferent | 6-30 Experten | 3-12 | 2-6 | 2-6 |
Formatdifferent | Async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Expert Forecast, Consensus Range, Assumption Notes | Postmortem Doc, Action Items, Timeline | MORT Worksheets, Findings per Branch, Corrective Actions, Systemic Recommendations | Barrier Inventory, Failure Analysis per Barrier, Action Backlog |
Tagsno overlap | ForecastingExpertsDecisionStrategy | Site Reliability EngineeringIncidentLearningReliability | Root causeSafetySystemicIncident | Root causeSafetyIncident |