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| Criterion |  Knowledge Modeling IBIS |  Operations 8D Problem Solving |  Decision Making Argument Mapping |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | 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. | For an acute quality or delivery problem, the method structures immediate protection and root cause work together. It keeps the situation stable while the actual cause is investigated cleanly. | 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. | For a single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description. |
Complexitydifferent | Medium | High | Medium | Low |
Timedifferent | 1-3 h | 1-6 Wochen | 1-3 h | 15-30 min |
Participantsdifferent | 2-8 | 4-10 | 1-8 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Issue Map, Positions, Argument Notes | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Argument Map, Evidence Gaps, Decision Rationale | Root cause notes, Countermeasures |
Tagsno overlap | RationaleKnowledgeDecision | QualityProblem solvingRoot cause | SensemakingDecisionRationale | Root causeIncidentLeanProblem solving |