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Selected:Causal Factor AnalysisALPEN MethodFailure Mode and Effects AnalysisRoot Cause Tree Analysis
| Criterion |  Operations Causal Factor Analysis |  Operations ALPEN Method |  Operations Failure Mode and Effects Analysis |  Operations Root Cause Tree 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 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. | For a process, product, or service with noticeable failure risks, the method assesses possible failure modes in advance. It directs attention to combinations of occurrence, effect, and detectability. | For a problem with several suspected causes, the method builds a causal structure instead of a mere list. It makes visible how causes connect and where the strongest points of leverage lie. |
Complexitydifferent | High | Low | High | Medium |
Timedifferent | 2-6 h | 10-20 min daily | 2-6 h | 1-3 h |
Participantsdifferent | 3-10 | 1 | 3-10 | 2-8 |
Formatdifferent | Workshop + async | Async | Workshop | Workshop |
Outputdifferent | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions | Daily Plan, Time Estimates, Review Notes | FMEA Table, Risk Priority, Mitigation Actions | Cause Tree, Evidence Notes, Countermeasures |
Tagsno overlap | CausalityIncidentRoot causeTimeline | PlanningTime managementProductivityOperations | RiskQualityOperationsRoot cause | Root causeTreeIncidentQuality |