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| Criterion |  Operations Runbook |  Operations Gemba Walk |  DevOps Blameless Postmortem |  Operations Learning Review |
|---|---|---|---|---|
Purposedifferent | For recurring operational tasks or incidents, the method keeps solid action logic ready. It reduces uncertainty when time pressure, role changes, or rare situations demand fast access. | When there is uncertainty about the real course of a process, the method brings observation to the place where work happens. It combines perception, follow-up questions, and process knowledge so decisions rest on actual workflows instead of assumptions. | 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. |
Complexitydifferent | Low | Low | Medium | Medium |
Timedifferent | 20-60 min | 30-120 min | 30-90 min | 1-3 h |
Participantsdifferent | 1-4 | 2-6 | 3-12 | 3-10 |
Formatdifferent | Async | Workshop | Workshop + async | Workshop |
Outputdifferent | Runbook, Checklist, Escalation Path | Observation Notes, Improvement Ideas | Postmortem Doc, Action Items, Timeline | Learning Review Notes, System Factors, Improvement Actions |
Tagsno overlap | OperationsReliabilityDocumentation | LeanObservationProcessOperations | Site Reliability EngineeringIncidentLearningReliability | LearningRetrospectiveIncidentOperations |