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| Criterion |  UX Research User Interviews |  Operations Root Cause Tree Analysis |  UX Research Personas |
|---|---|---|---|
Purposedifferent | When teams derive needs only from assumptions and real motives are missing, user interviews give direct access to behavior and meaning. Conversations from the target group's everyday life make patterns, tensions, and open questions solidly visible. | 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. | When target groups stay too vague and teams talk about the same people differently, personas create a shared, solid picture of usage. Condensed profiles make needs, contexts, and differences tangible enough for decisions. |
Complexitydifferent | Low | Medium | Medium |
Timedifferent | 30–60 min per interview | 1-3 h | 1-3 Tage |
Participantsdifferent | 1 participant per interview | 2-8 | Internes Team |
Formatdifferent | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Interview Notes, Themes, Insight Summary | Cause Tree, Evidence Notes, Countermeasures | Persona Profiles, Needs Summary, Scenario Notes |
Tagsno overlap | QualitativeResearchCustomerDiscovery | Root causeTreeIncidentQuality | ResearchCustomerSynthesis |
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