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