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| Criterion |  Product Discovery Solution Interview |  Operations Gemba Walk |  Growth A/B Testing |
|---|---|---|---|
Purposedifferent | 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 there is uncertainty about the real course of a process, the method brings observation to the place where work happens. It combines perception, follow-up questions, and process knowledge so decisions rest on actual workflows instead of assumptions. | When two variants compete, discussions quickly decide by taste rather than effect. A/B Testing checks behavior under controlled conditions and separates real improvement from chance or expectation effects. |
Complexitydifferent | Medium | Low | High |
Timedifferent | 30-60 min je Interview | 30-120 min | 1-4 Wochen |
Participantsdifferent | 5-10 Interviews | 2-6 | 1-6 |
Formatdifferent | Workshop + async | Workshop | Async |
Outputdifferent | Solution Feedback, Objection List, Validation Notes | Observation Notes, Improvement Ideas | Experiment results, Decision log, Learning summary |
Tagsno overlap | ValidationInterviewsPrototype | LeanObservationProcessOperations | ExperimentsGrowthAnalyticsValidation |
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