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| Criterion |  Engineering Fault Isolation |  Knowledge Modeling IBIS |  Facilitation 3-Circle Venn Diagram |  Decision Making Argument Mapping |
|---|---|---|---|---|
Purposedifferent | In technical failures, the visible symptom often gets mixed up with the actual cause. Fault Isolation narrows the fault space and progressively reduces which part of the system is truly affected. | IBIS structures thinking about complex questions as a sequence of issues, ideas, and arguments. The method keeps discussions open without forcing them into premature consensus. | 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. | When statements, evidence, and counterarguments get mixed up, a debate quickly loses its structure. Argument Mapping breaks a thesis down into its reasoning and makes visible what it really rests on. |
Complexitydifferent | Medium | Medium | Low | Medium |
Timedifferent | 30-180 min | 1-3 h | 15-45 min | 1-3 h |
Participantsdifferent | 1-6 | 2-8 | 2-8 | 1-8 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area | Issue Map, Positions, Argument Notes | Venn Diagram, Overlap Notes, Differentiators | Argument Map, Evidence Gaps, Decision Rationale |
Tagsno overlap | TroubleshootingDiagnosisEngineering | RationaleKnowledgeDecision | ComparisonFacilitationAlignment | SensemakingDecisionRationale |