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| Criterion |  Operations 5 Whys |  UX Research Affinity Diagramming |  Operations Root Cause Tree Analysis |
|---|---|---|---|
Purposedifferent | 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. | 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. |
Complexitydifferent | Low | Low | Medium |
Timedifferent | 15-30 min | 45–90 min | 1-3 h |
Participantsdifferent | 2-6 | 3-10 | 2-8 |
Formatsame | Workshop | Workshop | Workshop |
Outputdifferent | Root cause notes, Countermeasures | Theme clusters, Insight statements, Opportunity areas | Cause Tree, Evidence Notes, Countermeasures |
Tags1 shared | Root causeIncidentLeanProblem solving | SynthesisQualitativeRoot cause | Root causeTreeIncidentQuality |
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