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| Criterion |  UX Research Empathy Mapping |  UX Research Card Sorting |  Operations Root Cause Analysis |
|---|---|---|---|
Purposedifferent | When a lot is assumed about a target group but little is seen jointly, empathy mapping makes knowledge and gaps directly comparable. The picture also shows which assumptions hold up and where evidence is missing. | 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. | When a problem keeps recurring and the cause stays unclear, the method exposes the underlying mechanism. It separates symptom, guess, and robust explanation from one another. |
Complexitydifferent | Low | Low | Medium |
Timedifferent | 30–60 min | 20-45 min | 1-4 h |
Participantsdifferent | 4-8 | Based on research question | 3-8 |
Formatdifferent | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Empathy Map, Assumptions List, Research Gaps | Content groups, Label set, IA hypotheses | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan |
Tagsno overlap | SynthesisQualitativeWorkshop | Information architectureNavigationStructure | Root causeProblem solvingQualityIncident |
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