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| Criterion |  Operations Kaizen Event |  UX Research Tree Testing |  Operations PDCA Cycle |  UX Research Card Sorting |
|---|---|---|---|---|
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 navigation exists but search paths still fail, tree testing checks findability without visual distraction. The method shows whether labels, levels, and paths really lead to the intended destination. | 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. | When content only makes sense internally and users can't find the structure again, card sorting exposes their mental order. Terms, groups, and naming are then aligned with the target group's expectations. |
Complexitydifferent | Medium | Medium | Low | Low |
Timedifferent | 0.5-5 Tage | 1-2 Tage | 1 h bis mehrere Wochen | 20-45 min |
Participantsdifferent | 4-10 | Based on research question | 1-8 | Based on research question |
Formatdifferent | Workshop | Async | Workshop + async | Workshop + async |
Outputdifferent | Kaizen Charter, Waste List, Improvement Experiments, Standard Work Update | Findability Metrics, Path Analysis, Revised IA | PDCA Log, Experiment Plan, Learning Outcome, Standard Change | Content groups, Label set, IA hypotheses |
Tagsno overlap | LeanContinuous improvementOperations | Information architectureNavigationFindability | Continuous improvementLeanExperiments | Information architectureNavigationStructure |