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| Criterion |  Operations Causal Factor Analysis |  Operations Ivy Lee Method |  DevOps Blameless Postmortem |  DevOps Incident Timeline Analysis |
|---|---|---|---|---|
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. | With a restless workday full of too many open items, the method creates radical simplicity. It directs attention to a short sequence instead of a broad, still-open field. | 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 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. |
Complexitydifferent | High | Low | Medium | Medium |
Timedifferent | 2-6 h | 5-10 min daily | 30-90 min | 60-180 min |
Participantsdifferent | 3-10 | 1 | 3-12 | 3-10 |
Formatdifferent | Workshop + async | Async | Workshop + async | Workshop + async |
Outputdifferent | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions | Daily Priority List, Completion Notes | Postmortem Doc, Action Items, Timeline | Incident Timeline, Evidence Log, Delay Analysis, Improvement Actions |
Tagsno overlap | CausalityIncidentRoot causeTimeline | PrioritizationProductivityExecution | Site Reliability EngineeringIncidentLearningReliability | IncidentTimelineSite Reliability Engineering |