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| Criterion |  Operations Causal Factor Analysis |  Operations Change 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. | For a deviation after a change, the method isolates the influence of the altered condition. It narrows down which differences are relevant and which are just accompanying noise. | 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 | Medium | Medium |
Timedifferent | 2-6 h | 45-120 min | 1-3 h |
Participantsdifferent | 3-10 | 2-6 | 2-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions | Change Matrix, Cause Hypotheses, Validation Questions, Action List | Cause Tree, Evidence Notes, Countermeasures |
Tags1 shared | CausalityIncidentRoot causeTimeline | ChangeRoot causeTroubleshootingComparison | Root causeTreeIncidentQuality |
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