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| Criterion |  DevOps Blameless Postmortem |  Decision Making Delphi Method |  Operations 5 Whys |
|---|---|---|---|
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. | 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. |
Complexitydifferent | Medium | High | Low |
Timedifferent | 30-90 min | 1-4 Wochen | 15-30 min |
Participantsdifferent | 3-12 | 6-30 Experten | 2-6 |
Formatdifferent | Workshop + async | Async | Workshop |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Expert Forecast, Consensus Range, Assumption Notes | Root cause notes, Countermeasures |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | ForecastingExpertsDecisionStrategy | Root causeIncidentLeanProblem solving |
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