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| Criterion |  Innovation Double Diamond |  Product Discovery Solution Interview |  Operations A3 Problem Solving |  Operations 5 Whys |
|---|---|---|---|---|
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 complex deviation with several people involved, the method bundles problem, analysis, and decision onto one page. It creates a shared working space where causes, countermeasures, and follow-up fit together. | 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. |
Complexitydifferent | Medium | Medium | Medium | Low |
Timedifferent | Wochen bis Monate | 30-60 min je Interview | 45-90 min | 15-30 min |
Participantsdifferent | 3-12 | 5-10 Interviews | 2-5 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Problem Statement, Solution Options, Prototypes, Deliverables per Phase | Solution Feedback, Objection List, Validation Notes | A3 Report, Action Plan, Root Cause Analysis | Root cause notes, Countermeasures |
Tagsno overlap | ProcessDivergenceInnovation | ValidationInterviewsPrototype | LeanProblem solvingCoachingOperations | Root causeIncidentLeanProblem solving |