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| Criterion |  Operations PDCA Cycle |  Operations 8D Problem Solving |  Product Discovery Fake Door Test |  Product Discovery MVP Test Matrix |
|---|---|---|---|---|
Purposedifferent | For an improvement that still has to prove itself in everyday work, the method runs it through small learning loops. It connects planning, checking, and standardization into a repeatable learning mode. | For an acute quality or delivery problem, the method structures immediate protection and root cause work together. It keeps the situation stable while the actual cause is investigated cleanly. | 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 | Low | High | Medium | Medium |
Timedifferent | 1 h bis mehrere Wochen | 1-6 Wochen | 1-5 Tage | 45-75 min |
Participantsdifferent | 1-8 | 4-10 | Nutzertraffic | 2-8 |
Formatdifferent | Workshop + async | Workshop + async | Async | Workshop |
Outputdifferent | PDCA Log, Experiment Plan, Learning Outcome, Standard Change | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Click Data, Interest Signal, Learning Decision | Test Matrix, Test Plan |
Tagsno overlap | Continuous improvementLeanExperiments | QualityProblem solvingRoot cause | ValidationExperimentsDemandDiscovery | ExperimentsValidationDiscoveryOptions |