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| Criterion |  Innovation Double Diamond |  Product Discovery Solution Interview |  UX Research Usability Testing |
|---|---|---|---|
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 solution idea is already on the table, it checks how it is understood and evaluated. It looks for resonance, objections, and missing fit early in the conversation. | 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. |
Complexitysame | Medium | Medium | Medium |
Timedifferent | Wochen bis Monate | 30-60 min je Interview | 1-2 h je Session |
Participantsdifferent | 3-12 | 5-10 Interviews | Based on research question |
Formatsame | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Problem Statement, Solution Options, Prototypes, Deliverables per Phase | Solution Feedback, Objection List, Validation Notes | Usability Issues, Severity List, Recommendations |
Tagsno overlap | ProcessDivergenceInnovation | ValidationInterviewsPrototype | ValidationUXPrototype |
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