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| Criterion |  Operations Fault Tree Analysis |  Operations Ivy Lee Method |  Operations Barrier Analysis |
|---|---|---|---|
Purposedifferent | For a critical top event with several possible triggers, the method logically models failure paths. It makes visible which combinations of conditions can lead to damage. | 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 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 |
Timedifferent | 2-6 h | 5-10 min daily | 2-4 h |
Participantsdifferent | 3-8 | 1 | 2-6 |
Formatdifferent | Workshop + async | Async | Workshop + async |
Outputdifferent | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Daily Priority List, Completion Notes | Barrier Inventory, Failure Analysis per Barrier, Action Backlog |
Tagsno overlap | RiskRoot causeSafety | PrioritizationProductivityExecution | Root causeSafetyIncident |
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