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| Criterion |  Operations PDCA Cycle |  DevOps Blameless Postmortem |  Operations Learning Review |  Agile 4Ls Retrospective |
|---|---|---|---|---|
Purposedifferent | For an improvement that still has to prove itself in everyday work, the method runs it through small learning loops. It connects planning, checking, and standardization into a repeatable learning mode. | 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 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 | Medium | Low |
Timedifferent | 1 h bis mehrere Wochen | 30-90 min | 1-3 h | 45–75 min |
Participantsdifferent | 1-8 | 3-12 | 3-10 | Team members involved |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop |
Outputdifferent | PDCA Log, Experiment Plan, Learning Outcome, Standard Change | Postmortem Doc, Action Items, Timeline | Learning Review Notes, System Factors, Improvement Actions | 4Ls Board, Learning Themes, Improvement Actions |
Tagsno overlap | Continuous improvementLeanExperiments | Site Reliability EngineeringIncidentLearningReliability | LearningRetrospectiveIncidentOperations | RetrospectiveLearningReflectionTeam |