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| Criterion |  UX Research Affinity Diagramming |  UX Research Tree Testing |  Operations 5 Whys |  Operations Barrier Analysis |
|---|---|---|---|---|
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 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. | For a risk that can only be managed through multiple layers of protection, the method examines the effectiveness of each barrier. It shows where safeguards are missing, too weak, or fail under real conditions. |
Complexitydifferent | Low | Medium | Low | Medium |
Timedifferent | 45–90 min | 1-2 Tage | 15-30 min | 2-4 h |
Participantsdifferent | 3-10 | Based on research question | 2-6 | 2-6 |
Formatdifferent | Workshop | Async | Workshop | Workshop + async |
Outputdifferent | Theme clusters, Insight statements, Opportunity areas | Findability Metrics, Path Analysis, Revised IA | Root cause notes, Countermeasures | Barrier Inventory, Failure Analysis per Barrier, Action Backlog |
Tagsno overlap | SynthesisQualitativeRoot cause | Information architectureNavigationFindability | Root causeIncidentLeanProblem solving | Root causeSafetyIncident |