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| Criterion |  Operations Kaizen Event |  UX Research Empathy Mapping |  UX Research Personas |  UX Research User Interviews |
|---|---|---|---|---|
Purposedifferent | 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 a lot is assumed about a target group but little is seen jointly, empathy mapping makes knowledge and gaps directly comparable. The picture also shows which assumptions hold up and where evidence is missing. | 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. | 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. |
Complexitydifferent | Medium | Low | Medium | Low |
Timedifferent | 0.5-5 Tage | 30–60 min | 1-3 Tage | 30–60 min per interview |
Participantsdifferent | 4-10 | 4-8 | Internes Team | 1 participant per interview |
Formatdifferent | Workshop | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Kaizen Charter, Waste List, Improvement Experiments, Standard Work Update | Empathy Map, Assumptions List, Research Gaps | Persona Profiles, Needs Summary, Scenario Notes | Interview Notes, Themes, Insight Summary |
Tagsno overlap | LeanContinuous improvementOperations | SynthesisQualitativeWorkshop | ResearchCustomerSynthesis | QualitativeResearchCustomerDiscovery |