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| Criterion |  Decision Making Wideband Delphi |  DevOps Blameless Postmortem |  Operations Root Cause Tree Analysis |
|---|---|---|---|
Purposedifferent | A single opinion rarely holds up for planning when the future is genuinely uncertain. It separates options, evaluation criteria, and open risks. The result is captured as an Estimate Range, Assumption Log, and Expert Consensus Notes. | 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 problem with several suspected causes, the method builds a causal structure instead of a mere list. It makes visible how causes connect and where the strongest points of leverage lie. |
Complexitydifferent | High | Medium | Medium |
Timedifferent | 1-4 h or multiple rounds | 30-90 min | 1-3 h |
Participantsdifferent | 4-12 Experten | 3-12 | 2-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Estimate Range, Assumption Log, Expert Consensus Notes | Postmortem Doc, Action Items, Timeline | Cause Tree, Evidence Notes, Countermeasures |
Tagsno overlap | EstimationExpertsForecasting | Site Reliability EngineeringIncidentLearningReliability | Root causeTreeIncidentQuality |
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