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| Criterion |  Operations Kaizen Event |  UX Research Tree Testing |  UX Research First-click Testing |  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. | When users immediately turn the wrong way on a screen or wireframe, first click testing checks initial orientation at high speed. The first click shows early whether expectation, labeling, and wayfinding fit together. | 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 | 1-2 Tage | 20-45 min |
Participantsdifferent | 4-10 | Based on research question | 10-30 | Based on research question |
Formatdifferent | Workshop | Async | Async | Workshop + async |
Outputdifferent | Kaizen Charter, Waste List, Improvement Experiments, Standard Work Update | Findability Metrics, Path Analysis, Revised IA | Click Heatmap, Success Rate, Design Recommendations | Content groups, Label set, IA hypotheses |
Tagsno overlap | LeanContinuous improvementOperations | Information architectureNavigationFindability | UXNavigationFindabilityValidation | Information architectureNavigationStructure |