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| Criterion |  Innovation Double Diamond |  Innovation Design Thinking |  UX Research Usability Testing |  Product Discovery Solution Interview |
|---|---|---|---|---|
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. | 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 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 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. |
Complexitydifferent | Medium | High | Medium | Medium |
Timedifferent | Wochen bis Monate | 1 Tag bis mehrere Wochen | 1-2 h je Session | 30-60 min je Interview |
Participantsdifferent | 3-12 | 4-10 | Based on research question | 5-10 Interviews |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Problem Statement, Solution Options, Prototypes, Deliverables per Phase | Problem Statement, Prototype, Test Learnings | Usability Issues, Severity List, Recommendations | Solution Feedback, Objection List, Validation Notes |
Tagsno overlap | ProcessDivergenceInnovation | InnovationPrototypeResearch | ValidationUXPrototype | ValidationInterviewsPrototype |