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| Criterion |  UX Research User Interviews |  Operations PDCA Cycle |  Operations 5 Whys |
|---|---|---|---|
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 an improvement that still has to prove itself in everyday work, the method runs it through small learning loops. It connects planning, checking, and standardization into a repeatable learning mode. | 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. |
Complexitysame | Low | Low | Low |
Timedifferent | 30–60 min per interview | 1 h bis mehrere Wochen | 15-30 min |
Participantsdifferent | 1 participant per interview | 1-8 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Interview Notes, Themes, Insight Summary | PDCA Log, Experiment Plan, Learning Outcome, Standard Change | Root cause notes, Countermeasures |
Tagsno overlap | QualitativeResearchCustomerDiscovery | Continuous improvementLeanExperiments | Root causeIncidentLeanProblem solving |
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