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| Criterion |  Operations Fault Tree Analysis |  Operations Causal Factor Analysis |  DevOps Incident Timeline Analysis |  DevOps Blameless Postmortem |
|---|---|---|---|---|
Purposedifferent | For a critical top event with several possible triggers, the method logically models failure paths. It makes visible which combinations of conditions can lead to damage. | 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. | For an incident with an unclear sequence, the method makes the timeline precisely visible. It separates perception, reaction, and delay so cause and effect become more clearly readable. | 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. |
Complexitydifferent | High | High | Medium | Medium |
Timedifferent | 2-6 h | 2-6 h | 60-180 min | 30-90 min |
Participantsdifferent | 3-8 | 3-10 | 3-10 | 3-12 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions | Incident Timeline, Evidence Log, Delay Analysis, Improvement Actions | Postmortem Doc, Action Items, Timeline |
Tagsno overlap | RiskRoot causeSafety | CausalityIncidentRoot causeTimeline | IncidentTimelineSite Reliability Engineering | Site Reliability EngineeringIncidentLearningReliability |