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| Criterion |  Operations Causal Factor Analysis |  Facilitation Nominal Group Technique |  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. | When loud voices could dominate a round, Nominal Group Technique protects individual thinking time from group effects. It collects ideas separately first and only then enables shared weighting. | 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 | Medium | Medium |
Timedifferent | 2-6 h | 60-120 min | 2-4 h |
Participantsdifferent | 3-10 | 5-12 | 2-6 |
Formatdifferent | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions | Ranked Ideas, Clarified Options, Group Priority | Barrier Inventory, Failure Analysis per Barrier, Action Backlog |
Tagsno overlap | CausalityIncidentRoot causeTimeline | FacilitationPrioritizationVotingInclusion | Root causeSafetyIncident |
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