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| Criterion |  Innovation Double Diamond |  UX Research Usability Testing |  UX Research Card Sorting |  Innovation Design Thinking |
|---|---|---|---|---|
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 product is built but people get stuck on tasks, usability testing shows the friction at concrete points. Observed use instead of self-report makes visible where orientation, understanding, or interaction breaks down. | 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 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. |
Complexitydifferent | Medium | Medium | Low | High |
Timedifferent | Wochen bis Monate | 1-2 h je Session | 20-45 min | 1 Tag bis mehrere Wochen |
Participantsdifferent | 3-12 | Based on research question | Based on research question | 4-10 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Problem Statement, Solution Options, Prototypes, Deliverables per Phase | Usability Issues, Severity List, Recommendations | Content groups, Label set, IA hypotheses | Problem Statement, Prototype, Test Learnings |
Tagsno overlap | ProcessDivergenceInnovation | ValidationUXPrototype | Information architectureNavigationStructure | InnovationPrototypeResearch |