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| Criterion |  Operations DMAIC |  Operations 5 Whys |  Growth A/B Testing |  Operations PDCA Cycle |
|---|---|---|---|---|
Purposedifferent | For a process problem with fluctuating performance, the method brings analysis and improvement into a disciplined sequence. It creates a framework in which numbers, causes, and control come 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. | 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. | 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. |
Complexitydifferent | High | Low | High | Low |
Timedifferent | 2-12 Wochen | 15-30 min | 1-4 Wochen | 1 h bis mehrere Wochen |
Participantsdifferent | 3-10 | 2-6 | 1-6 | 1-8 |
Formatdifferent | Workshop + async | Workshop | Async | Workshop + async |
Outputdifferent | Project Charter, Measurement Plan, Cause Analysis, Control Plan | Root cause notes, Countermeasures | Experiment results, Decision log, Learning summary | PDCA Log, Experiment Plan, Learning Outcome, Standard Change |
Tagsno overlap | Continuous improvementQualityProcess improvement | Root causeIncidentLeanProblem solving | ExperimentsGrowthAnalyticsValidation | Continuous improvementLeanExperiments |