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| Criterion |  DevOps Blameless Postmortem |  Decision Making Delphi Method |  Operations Root Cause Analysis |
|---|---|---|---|
Purposedifferent | 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. | 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. |
Complexitydifferent | Medium | High | Medium |
Timedifferent | 30-90 min | 1-4 Wochen | 1-4 h |
Participantsdifferent | 3-12 | 6-30 Experten | 3-8 |
Formatdifferent | Workshop + async | Async | Workshop + async |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Expert Forecast, Consensus Range, Assumption Notes | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | ForecastingExpertsDecisionStrategy | Root causeProblem solvingQualityIncident |
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