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| Criterion |  UX Research User Interviews |  Operations PDCA Cycle |  Product Discovery Test Card |
|---|---|---|---|
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. | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. |
Complexitysame | Low | Low | Low |
Timedifferent | 30–60 min per interview | 1 h bis mehrere Wochen | 20-35 min |
Participantsdifferent | 1 participant per interview | 1-8 | 1-5 |
Formatsame | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Interview Notes, Themes, Insight Summary | PDCA Log, Experiment Plan, Learning Outcome, Standard Change | Test Card with a pre-set threshold |
Tagsno overlap | QualitativeResearchCustomerDiscovery | Continuous improvementLeanExperiments | ExperimentsValidationDiscoveryHypothesis |
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