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| Criterion |  Operations A3 Problem Solving |  Operations Gemba Walk |  Product Discovery Fake Door Test |  Product Discovery MVP Test Matrix |
|---|---|---|---|---|
Purposedifferent | 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. | 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 demand is still unclear, it measures interest in a feature before it is built. It separates real behavior from polite agreement and deliberately keeps build effort small. | When several minimal variants compete to answer the same question, it makes comparing and choosing between them cleaner. It separates problem, assumption, solution, and evidence. The result is captured as a Test Matrix and a Test Plan. |
Complexitydifferent | Medium | Low | Medium | Medium |
Timedifferent | 45-90 min | 30-120 min | 1-5 Tage | 45-75 min |
Participantsdifferent | 2-5 | 2-6 | Nutzertraffic | 2-8 |
Formatdifferent | Workshop + async | Workshop | Async | Workshop |
Outputdifferent | A3 Report, Action Plan, Root Cause Analysis | Observation Notes, Improvement Ideas | Click Data, Interest Signal, Learning Decision | Test Matrix, Test Plan |
Tagsno overlap | LeanProblem solvingCoachingOperations | LeanObservationProcessOperations | ValidationExperimentsDemandDiscovery | ExperimentsValidationDiscoveryOptions |