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| Criterion |  Operations Causal Factor Analysis |  Operations Ivy Lee Method |  DevOps Incident Timeline Analysis |  Operations Barrier 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. | 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. | 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. |
Complexitydifferent | High | Low | Medium | Medium |
Timedifferent | 2-6 h | 5-10 min daily | 60-180 min | 2-4 h |
Participantsdifferent | 3-10 | 1 | 3-10 | 2-6 |
Formatdifferent | Workshop + async | Async | Workshop + async | Workshop + async |
Outputdifferent | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions | Daily Priority List, Completion Notes | Incident Timeline, Evidence Log, Delay Analysis, Improvement Actions | Barrier Inventory, Failure Analysis per Barrier, Action Backlog |
Tagsno overlap | CausalityIncidentRoot causeTimeline | PrioritizationProductivityExecution | IncidentTimelineSite Reliability Engineering | Root causeSafetyIncident |