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