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| Criterion |  DevOps Blameless Postmortem |  Systems Thinking Current Reality Tree |  Operations Family Tree Analysis |  Operations Causal Factor Analysis |
|---|---|---|---|---|
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. | A Current Reality Tree condenses many symptoms into a few causal chains. The method makes visible which core problems drive several negative effects at once. | For a series of incidents with a similar pattern, the method arranges individual events as branches of a common origin. It makes visible which conditions keep recurring. | 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. |
Complexitydifferent | Medium | High | Medium | High |
Timedifferent | 30-90 min | 2-6 h | 2-4 h | 2-6 h |
Participantsdifferent | 3-12 | 3-8 | 2-6 | 3-10 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Postmortem Doc, Action Items, Timeline | Current Reality Tree, Core Problems, Intervention Ideas | Family Tree Diagram, Pattern Notes, Systemic Measures | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions |
Tagsno overlap | Site Reliability EngineeringIncidentLearningReliability | Systems thinkingRoot causeConstraintsCausality | Root causePatternsIncidentSystemic | CausalityIncidentRoot causeTimeline |