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| Criterion |  DevOps Blameless Postmortem |  Operations Learning Review |  Decision Making Delphi Method |  Agile 4Ls Retrospective |
|---|---|---|---|---|
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. | After a project phase with mixed results, the method makes learning from the individual case reusable. It connects events, decisions, and systemic conditions into robust insights. | 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. | When a sprint should not only be assessed but also learned from, it captures experience in clear learning categories. It records what worked, what's missing, and what should run differently next time. |
Complexitydifferent | Medium | Medium | High | Low |
Timedifferent | 30-90 min | 1-3 h | 1-4 Wochen | 45–75 min |
Participantsdifferent | 3-12 | 3-10 | 6-30 Experten | Team members involved |
Formatdifferent | Workshop + async | Workshop | Async | Workshop |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Learning Review Notes, System Factors, Improvement Actions | Expert Forecast, Consensus Range, Assumption Notes | 4Ls Board, Learning Themes, Improvement Actions |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | LearningRetrospectiveIncidentOperations | ForecastingExpertsDecisionStrategy | RetrospectiveLearningReflectionTeam |