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| Criterion |  Operations Change Analysis |  Operations Fault Tree Analysis |  Facilitation 3-Circle Venn Diagram |
|---|---|---|---|
Purposedifferent | 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 critical top event with several possible triggers, the method logically models failure paths. It makes visible which combinations of conditions can lead to damage. | When three perspectives matter at the same time, a Three-Circle Venn Diagram shows the overlaps and remainders precisely. It makes visible where shared effect arises and where only a partial perspective applies. |
Complexitydifferent | Medium | High | Low |
Timedifferent | 45-120 min | 2-6 h | 15-45 min |
Participantsdifferent | 2-6 | 3-8 | 2-8 |
Formatsame | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Change Matrix, Cause Hypotheses, Validation Questions, Action List | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Venn Diagram, Overlap Notes, Differentiators |
Tagsno overlap | ChangeRoot causeTroubleshootingComparison | RiskRoot causeSafety | ComparisonFacilitationAlignment |
Often compared together
Methods with strong topical overlap with the current selection, not yet in the comparison.
