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| Criterion |  Innovation Double Diamond |  UX Research Card Sorting |  UX Research Usability Testing |  Innovation Design Sprint |
|---|---|---|---|---|
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 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 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 the product question is unclear and time pressure is high, the method takes a team from an open idea to a testable solution. It connects problem understanding, decision, and learning in one compact format, lowering the risk of spending a lot of energy on a mere guess. |
Complexitydifferent | Medium | Low | Medium | High |
Timedifferent | Wochen bis Monate | 20-45 min | 1-2 h je Session | 4-5 Tage |
Participantsdifferent | 3-12 | Based on research question | Based on research question | 5-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Problem Statement, Solution Options, Prototypes, Deliverables per Phase | Content groups, Label set, IA hypotheses | Usability Issues, Severity List, Recommendations | Prototype, Test Findings, Decision Rationale |
Tagsno overlap | ProcessDivergenceInnovation | Information architectureNavigationStructure | ValidationUXPrototype | Design sprintPrototypeValidationInnovation |