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| Criterion |  UX Research User Interviews |  Operations Standard Work Analysis |  Operations Root Cause Tree Analysis |
|---|---|---|---|
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. | When the same task is done differently depending on the person, the method exposes the reliable core. It creates comparability without unnecessarily choking off needed latitude. | 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 | Medium | Medium |
Timedifferent | 30–60 min per interview | 1-3 h | 1-3 h |
Participantsdifferent | 1 participant per interview | 2-6 | 2-8 |
Formatdifferent | Workshop + async | Workshop | Workshop |
Outputdifferent | Interview Notes, Themes, Insight Summary | Standard Work Sheet, Deviation List, Improved Standard, Training Needs | Cause Tree, Evidence Notes, Countermeasures |
Tagsno overlap | QualitativeResearchCustomerDiscovery | LeanProcessQuality | Root causeTreeIncidentQuality |
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