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| Criterion |  UX Research Tree Testing |  Operations A3 Problem Solving |  UX Research Card Sorting |  Operations Gemba Walk |
|---|---|---|---|---|
Purposedifferent | 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 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. | 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 | 1-2 Tage | 45-90 min | 20-45 min | 30-120 min |
Participantsdifferent | Based on research question | 2-5 | Based on research question | 2-6 |
Formatdifferent | Async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Findability Metrics, Path Analysis, Revised IA | A3 Report, Action Plan, Root Cause Analysis | Content groups, Label set, IA hypotheses | Observation Notes, Improvement Ideas |
Tagsno overlap | Information architectureNavigationFindability | LeanProblem solvingCoachingOperations | Information architectureNavigationStructure | LeanObservationProcessOperations |