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| Criterion |  Operations Causal Factor Analysis |  Operations Barrier Analysis |  DevOps Incident Timeline Analysis |  DevOps Blameless Postmortem |
|---|---|---|---|---|
Purposedifferent | 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 a risk that can only be managed through multiple layers of protection, the method examines the effectiveness of each barrier. It shows where safeguards are missing, too weak, or fail under real conditions. | 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 | Medium | Medium | Medium |
Timedifferent | 2-6 h | 2-4 h | 60-180 min | 30-90 min |
Participantsdifferent | 3-10 | 2-6 | 3-10 | 3-12 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Incident Timeline, Evidence Log, Delay Analysis, Improvement Actions | Postmortem Doc, Action Items, Timeline |
Tags1 shared | CausalityIncidentRoot causeTimeline | Root causeSafetyIncident | IncidentTimelineSite Reliability Engineering | Site Reliability EngineeringIncidentLearningReliability |