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| Criterion |  DevOps Blameless Postmortem |  Decision Making Delphi Method |  Product Discovery Test Card |
|---|---|---|---|
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. | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. |
Complexitydifferent | Medium | High | Low |
Timedifferent | 30-90 min | 1-4 Wochen | 20-35 min |
Participantsdifferent | 3-12 | 6-30 Experten | 1-5 |
Formatdifferent | Workshop + async | Async | Workshop + async |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Expert Forecast, Consensus Range, Assumption Notes | Test Card with a pre-set threshold |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | ForecastingExpertsDecisionStrategy | ExperimentsValidationDiscoveryHypothesis |
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