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| Criterion |  UX Research User Interviews |  Operations Kaizen Event |  Operations DMAIC |  Operations A3 Problem Solving |
|---|---|---|---|---|
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 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. | For a process problem with fluctuating performance, the method brings analysis and improvement into a disciplined sequence. It creates a framework in which numbers, causes, and control come together. | For a complex deviation with several people involved, the method bundles problem, analysis, and decision onto one page. It creates a shared working space where causes, countermeasures, and follow-up fit together. |
Complexitydifferent | Low | Medium | High | Medium |
Timedifferent | 30–60 min per interview | 0.5-5 Tage | 2-12 Wochen | 45-90 min |
Participantsdifferent | 1 participant per interview | 4-10 | 3-10 | 2-5 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Interview Notes, Themes, Insight Summary | Kaizen Charter, Waste List, Improvement Experiments, Standard Work Update | Project Charter, Measurement Plan, Cause Analysis, Control Plan | A3 Report, Action Plan, Root Cause Analysis |
Tagsno overlap | QualitativeResearchCustomerDiscovery | LeanContinuous improvementOperations | Continuous improvementQualityProcess improvement | LeanProblem solvingCoachingOperations |