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| Criterion |  DevOps Blameless Postmortem |  Agile Sprint Retrospective |  Agile Starfish Retrospective |  Operations Learning Review |
|---|---|---|---|---|
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 a sprint is over and friction shouldn't simply be carried forward, it opens the view onto collaboration and patterns. It creates space to see causes and changes together. | When improvement options need to be sorted more finely than just start and stop, it brings observations into clear kinds of action. This makes visible what should be done more, less, newly, or continued. | 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. |
Complexitydifferent | Medium | Low | Low | Medium |
Timedifferent | 30-90 min | Up to 3 hours for a one-month Sprint; shorter Sprints are usually shorter | 45-90 min | 1-3 h |
Participantsdifferent | 3-12 | Scrum Team | 4-12 | 3-10 |
Formatdifferent | Workshop + async | Workshop | Workshop | Workshop |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Improvement actions, Team agreements | Starfish Board, Practice Changes, Experiments | Learning Review Notes, System Factors, Improvement Actions |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | RetrospectiveImprovementLearning | RetrospectiveImprovementExperimentsTeam | LearningRetrospectiveIncidentOperations |