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| Criterion |  Operations Kaizen Event |  UX Research Tree Testing |  UX Research Card Sorting |  Operations Gemba Walk |
|---|---|---|---|---|
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. | 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. | When there is uncertainty about the real course of a process, the method brings observation to the place where work happens. It combines perception, follow-up questions, and process knowledge so decisions rest on actual workflows instead of assumptions. |
Complexitydifferent | Medium | Medium | Low | Low |
Timedifferent | 0.5-5 Tage | 1-2 Tage | 20-45 min | 30-120 min |
Participantsdifferent | 4-10 | Based on research question | Based on research question | 2-6 |
Formatdifferent | Workshop | Async | Workshop + async | Workshop |
Outputdifferent | Kaizen Charter, Waste List, Improvement Experiments, Standard Work Update | Findability Metrics, Path Analysis, Revised IA | Content groups, Label set, IA hypotheses | Observation Notes, Improvement Ideas |
Tagsno overlap | LeanContinuous improvementOperations | Information architectureNavigationFindability | Information architectureNavigationStructure | LeanObservationProcessOperations |