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| Criterion |  Decision Making Wideband Delphi |  DevOps Blameless Postmortem |  Operations 5 Whys |
|---|---|---|---|
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 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 | High | Medium | Low |
Timedifferent | 1-4 h or multiple rounds | 30-90 min | 15-30 min |
Participantsdifferent | 4-12 Experten | 3-12 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Estimate Range, Assumption Log, Expert Consensus Notes | Postmortem Doc, Action Items, Timeline | Root cause notes, Countermeasures |
Tagsno overlap | EstimationExpertsForecasting | Site Reliability EngineeringIncidentLearningReliability | Root causeIncidentLeanProblem solving |
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