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| Criterion |  Innovation Double Diamond |  Product Discovery Solution Interview |  Decision Making Assumption Surfacing |  Product Discovery Problem 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. | 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. | Plans often contain assumptions that were never openly stated and remain dangerous precisely because of that. Assumption Surfacing makes these silent premises visible and prioritizes which of them carry the initiative or could sink it. | When the picture of the problem still needs to become solid, it asks about real situations and consequences. It separates genuine suffering from mere interest in a solution. |
Complexitydifferent | Medium | Medium | Low | Medium |
Timedifferent | Wochen bis Monate | 30-60 min je Interview | 45-90 min | 30-60 min je Interview |
Participantsdifferent | 3-12 | 5-10 Interviews | 2-8 | 5-12 Interviews |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Problem Statement, Solution Options, Prototypes, Deliverables per Phase | Solution Feedback, Objection List, Validation Notes | Assumption List, Critical Assumptions, Learning Plan | Problem Evidence, Risk Notes, Customer Segments |
Tagsno overlap | ProcessDivergenceInnovation | ValidationInterviewsPrototype | AssumptionsRiskDecisionDiscovery | DiscoveryInterviewsValidation |