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| Criterion |  Operations Kaizen Event |  UX Research User Interviews |  Operations PDCA Cycle |  Operations A3 Problem Solving |
|---|---|---|---|---|
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. | 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. | 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 | Medium | Low | Low | Medium |
Timedifferent | 0.5-5 Tage | 30–60 min per interview | 1 h bis mehrere Wochen | 45-90 min |
Participantsdifferent | 4-10 | 1 participant per interview | 1-8 | 2-5 |
Formatdifferent | Workshop | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Kaizen Charter, Waste List, Improvement Experiments, Standard Work Update | Interview Notes, Themes, Insight Summary | PDCA Log, Experiment Plan, Learning Outcome, Standard Change | A3 Report, Action Plan, Root Cause Analysis |
Tagsno overlap | LeanContinuous improvementOperations | QualitativeResearchCustomerDiscovery | Continuous improvementLeanExperiments | LeanProblem solvingCoachingOperations |