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| Criterion |  Operations Fault Tree Analysis |  Operations Causal Factor Analysis |  Operations ALPEN Method |
|---|---|---|---|
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. | 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 an overloaded day full of too many tasks, a realistic picture of the day emerges. The method connects estimating, deciding, and buffer thinking so planning fits available energy and time. |
Complexitydifferent | High | High | Low |
Timedifferent | 2-6 h | 2-6 h | 10-20 min daily |
Participantsdifferent | 3-8 | 3-10 | 1 |
Formatdifferent | Workshop + async | Workshop + async | Async |
Outputdifferent | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions | Daily Plan, Time Estimates, Review Notes |
Tagsno overlap | RiskRoot causeSafety | CausalityIncidentRoot causeTimeline | PlanningTime managementProductivityOperations |
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