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| Criterion |  UX Research User Interviews |  UX Research Personas |  Operations Kaizen Event |  Operations Gemba Walk |
|---|---|---|---|---|
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 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. | For a tightly scoped process segment with noticeable waste, the method bundles shared energy for change. It suits situations that call for fast learning loops and visible adjustments. | When there is uncertainty about the real course of a process, the method brings observation to the place where work happens. It combines perception, follow-up questions, and process knowledge so decisions rest on actual workflows instead of assumptions. |
Complexitydifferent | Low | Medium | Medium | Low |
Timedifferent | 30–60 min per interview | 1-3 Tage | 0.5-5 Tage | 30-120 min |
Participantsdifferent | 1 participant per interview | Internes Team | 4-10 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop |
Outputdifferent | Interview Notes, Themes, Insight Summary | Persona Profiles, Needs Summary, Scenario Notes | Kaizen Charter, Waste List, Improvement Experiments, Standard Work Update | Observation Notes, Improvement Ideas |
Tagsno overlap | QualitativeResearchCustomerDiscovery | ResearchCustomerSynthesis | LeanContinuous improvementOperations | LeanObservationProcessOperations |