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| Criterion |  Operations Kaizen Event |  UX Research User Interviews |  Domain Modeling EventStorming |  UX Research Empathy Mapping |
|---|---|---|---|---|
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 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 a domain consists of many events, rules, and states, it creates a shared modeling space for the team. It bundles language, flows, and boundaries before domain knowledge fragments into siloed views. | 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. |
Complexitydifferent | Medium | Low | Medium | Low |
Timedifferent | 0.5-5 Tage | 30–60 min per interview | 2-8 h | 30–60 min |
Participantsdifferent | 4-10 | 1 participant per interview | 5-12 | 4-8 |
Formatdifferent | Workshop | Workshop + async | Workshop | Workshop |
Outputdifferent | Kaizen Charter, Waste List, Improvement Experiments, Standard Work Update | Interview Notes, Themes, Insight Summary | Event Timeline, Ubiquitous Language, Boundaries, Open Questions | Empathy Map, Assumptions List, Research Gaps |
Tagsno overlap | LeanContinuous improvementOperations | QualitativeResearchCustomerDiscovery | Domain-Driven DesignEventsDiscoveryWorkshop | SynthesisQualitativeWorkshop |