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| Criterion |  Agile Sprint Retrospective |  DevOps Blameless Postmortem |  Operations ALPEN Method |  Agile 4Ls Retrospective |
|---|---|---|---|---|
Purposedifferent | 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. | 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. | With an overloaded day full of too many tasks, a realistic picture of the day emerges. The method connects estimating, deciding, and buffer thinking so planning fits available energy and time. | 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 | Low | Medium | Low | Low |
Timedifferent | Up to 3 hours for a one-month Sprint; shorter Sprints are usually shorter | 30-90 min | 10-20 min daily | 45–75 min |
Participantsdifferent | Scrum Team | 3-12 | 1 | Team members involved |
Formatdifferent | Workshop | Workshop + async | Async | Workshop |
Outputdifferent | Improvement actions, Team agreements | Postmortem Doc, Action Items, Timeline | Daily Plan, Time Estimates, Review Notes | 4Ls Board, Learning Themes, Improvement Actions |
Tagsno overlap | RetrospectiveImprovementLearning | Site Reliability EngineeringIncidentLearningReliability | PlanningTime managementProductivityOperations | RetrospectiveLearningReflectionTeam |