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| Criterion |  Decision Making Decision Matrix |  UX Research Affinity Diagramming |  Operations Root Cause Tree Analysis |  Operations 8D Problem Solving |
|---|---|---|---|---|
Purposedifferent | When several options collide with several criteria, comparison quickly becomes subjective. A Decision Matrix makes the trade-off visible and brings weighting, criteria, and options into a shared logic. | When research notes, feedback, or observations sit unconnected side by side, affinity diagramming sorts the raw material into solid themes. Many individual points turn into patterns that make decisions and opportunities clearer. | 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. | 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. |
Complexitydifferent | Medium | Low | Medium | High |
Timedifferent | 45-90 min | 45–90 min | 1-3 h | 1-6 Wochen |
Participantsdifferent | 2-8 | 3-10 | 2-8 | 4-10 |
Formatdifferent | Workshop + async | Workshop | Workshop | Workshop + async |
Outputdifferent | Decision Matrix, Scoring Rationale, Selected Option | Theme clusters, Insight statements, Opportunity areas | Cause Tree, Evidence Notes, Countermeasures | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan |
Tagsno overlap | DecisionCriteriaScoringTradeoffs | SynthesisQualitativeRoot cause | Root causeTreeIncidentQuality | QualityProblem solvingRoot cause |