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| Criterion |  UX Research Tree Testing |  UX Research Affinity Diagramming |  Operations 8D Problem Solving |  UX Research Card Sorting |
|---|---|---|---|---|
Purposedifferent | 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. | 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 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 content only makes sense internally and users can't find the structure again, card sorting exposes their mental order. Terms, groups, and naming are then aligned with the target group's expectations. |
Complexitydifferent | Medium | Low | High | Low |
Timedifferent | 1-2 Tage | 45–90 min | 1-6 Wochen | 20-45 min |
Participantsdifferent | Based on research question | 3-10 | 4-10 | Based on research question |
Formatdifferent | Async | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Findability Metrics, Path Analysis, Revised IA | Theme clusters, Insight statements, Opportunity areas | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Content groups, Label set, IA hypotheses |
Tagsno overlap | Information architectureNavigationFindability | SynthesisQualitativeRoot cause | QualityProblem solvingRoot cause | Information architectureNavigationStructure |