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| Criterion |  Operations Causal Factor Analysis |  DevOps Blameless Postmortem |  Operations Ivy Lee Method |
|---|---|---|---|
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. | 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. | 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. |
Complexitydifferent | High | Medium | Low |
Timedifferent | 2-6 h | 30-90 min | 5-10 min daily |
Participantsdifferent | 3-10 | 3-12 | 1 |
Formatdifferent | Workshop + async | Workshop + async | Async |
Outputdifferent | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions | Postmortem Doc, Action Items, Timeline | Daily Priority List, Completion Notes |
Tagsno overlap | CausalityIncidentRoot causeTimeline | Site Reliability EngineeringIncidentLearningReliability | PrioritizationProductivityExecution |
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