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| Criterion |  Innovation Double Diamond |  Product Discovery Solution Interview |  Operations 5 Whys |  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 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. | For a single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description. | 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 | Medium | Low | High |
Timedifferent | Wochen bis Monate | 30-60 min je Interview | 15-30 min | 4-5 Tage |
Participantsdifferent | 3-12 | 5-10 Interviews | 2-6 | 5-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop |
Outputdifferent | Problem Statement, Solution Options, Prototypes, Deliverables per Phase | Solution Feedback, Objection List, Validation Notes | Root cause notes, Countermeasures | Prototype, Test Findings, Decision Rationale |
Tagsno overlap | ProcessDivergenceInnovation | ValidationInterviewsPrototype | Root causeIncidentLeanProblem solving | Design sprintPrototypeValidationInnovation |