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| Criterion |  Operations A3 Problem Solving |  Product Discovery Test Card |  Operations Kaizen Event |
|---|---|---|---|
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. | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. | For a tightly scoped process segment with noticeable waste, the method bundles shared energy for change. It suits situations that call for fast learning loops and visible adjustments. |
Complexitydifferent | Medium | Low | Medium |
Timedifferent | 45-90 min | 20-35 min | 0.5-5 Tage |
Participantsdifferent | 2-5 | 1-5 | 4-10 |
Formatdifferent | Workshop + async | Workshop + async | Workshop |
Outputdifferent | A3 Report, Action Plan, Root Cause Analysis | Test Card with a pre-set threshold | Kaizen Charter, Waste List, Improvement Experiments, Standard Work Update |
Tagsno overlap | LeanProblem solvingCoachingOperations | ExperimentsValidationDiscoveryHypothesis | LeanContinuous improvementOperations |
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