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| Criterion |  DevOps Blameless Postmortem |  Operations Causal Factor Analysis |  Operations Fishbone Diagram |  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. | For an event with a complicated course, the method breaks down the contributing factors along the timeline. It shows how conditions, decisions, and reactions together produce a course of events. | When a problem has several possible contributing factors, the method sorts causes by cause areas. It prevents an initial hunch from blocking the view of other plausible drivers. | 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 | High | Low | Medium |
Timedifferent | 30-90 min | 2-6 h | 30-60 min | 1-3 h |
Participantsdifferent | 3-12 | 3-10 | 2-8 | 3-10 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions | Fishbone Diagram, Cause Categories, Investigation Backlog | Learning Review Notes, System Factors, Improvement Actions |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | CausalityIncidentRoot causeTimeline | Root causeQualityOperations | LearningRetrospectiveIncidentOperations |