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| Criterion |  UX Research Tree Testing |  UX Research Affinity Diagramming |  UX Research First-click Testing |  Operations 5 Whys |
|---|---|---|---|---|
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. | When users immediately turn the wrong way on a screen or wireframe, first click testing checks initial orientation at high speed. The first click shows early whether expectation, labeling, and wayfinding fit together. | 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 | Low | Low | Low |
Timedifferent | 1-2 Tage | 45–90 min | 1-2 Tage | 15-30 min |
Participantsdifferent | Based on research question | 3-10 | 10-30 | 2-6 |
Formatdifferent | Async | Workshop | Async | Workshop |
Outputdifferent | Findability Metrics, Path Analysis, Revised IA | Theme clusters, Insight statements, Opportunity areas | Click Heatmap, Success Rate, Design Recommendations | Root cause notes, Countermeasures |
Tagsno overlap | Information architectureNavigationFindability | SynthesisQualitativeRoot cause | UXNavigationFindabilityValidation | Root causeIncidentLeanProblem solving |