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| Criterion |  Decision Making Wideband Delphi |  DevOps Blameless Postmortem |  Systems Thinking Current Reality Tree |
|---|---|---|---|
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. | A Current Reality Tree condenses many symptoms into a few causal chains. The method makes visible which core problems drive several negative effects at once. |
Complexitydifferent | High | Medium | High |
Timedifferent | 1-4 h or multiple rounds | 30-90 min | 2-6 h |
Participantsdifferent | 4-12 Experten | 3-12 | 3-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Estimate Range, Assumption Log, Expert Consensus Notes | Postmortem Doc, Action Items, Timeline | Current Reality Tree, Core Problems, Intervention Ideas |
Tagsno overlap | EstimationExpertsForecasting | Site Reliability EngineeringIncidentLearningReliability | Systems thinkingRoot causeConstraintsCausality |
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