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| Criterion |  UX Research Affinity Diagramming |  UX Research Tree Testing |  Operations Root Cause Tree Analysis |  Operations 8D Problem Solving |
|---|---|---|---|---|
Purposedifferent | 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. | When a navigation exists but search paths still fail, tree testing checks findability without visual distraction. The method shows whether labels, levels, and paths really lead to the intended destination. | 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 | Low | Medium | Medium | High |
Timedifferent | 45–90 min | 1-2 Tage | 1-3 h | 1-6 Wochen |
Participantsdifferent | 3-10 | Based on research question | 2-8 | 4-10 |
Formatdifferent | Workshop | Async | Workshop | Workshop + async |
Outputdifferent | Theme clusters, Insight statements, Opportunity areas | Findability Metrics, Path Analysis, Revised IA | Cause Tree, Evidence Notes, Countermeasures | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan |
Tagsno overlap | SynthesisQualitativeRoot cause | Information architectureNavigationFindability | Root causeTreeIncidentQuality | QualityProblem solvingRoot cause |