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| Criterion |  Innovation Double Diamond |  UX Research Tree Testing |  Innovation Design Thinking |  UX Research Card Sorting |
|---|---|---|---|---|
Purposedifferent | For complex problems with a fuzzy situation, the method cleanly separates search space and decision. It first creates breadth in understanding and then focus in elaboration. This brings open questions, problem definition, and solution path into a traceable movement. | 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 complex user problems with an uncertain cause, the method connects observation, interpretation, and experiment into a learning cycle. It keeps the focus on real needs and avoids premature solution language. This produces robust decisions for product and service. | 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 | High | Low |
Timedifferent | Wochen bis Monate | 1-2 Tage | 1 Tag bis mehrere Wochen | 20-45 min |
Participantsdifferent | 3-12 | Based on research question | 4-10 | Based on research question |
Formatdifferent | Workshop + async | Async | Workshop | Workshop + async |
Outputdifferent | Problem Statement, Solution Options, Prototypes, Deliverables per Phase | Findability Metrics, Path Analysis, Revised IA | Problem Statement, Prototype, Test Learnings | Content groups, Label set, IA hypotheses |
Tagsno overlap | ProcessDivergenceInnovation | Information architectureNavigationFindability | InnovationPrototypeResearch | Information architectureNavigationStructure |