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| Criterion |  Operations DMAIC |  Systems Thinking Soft Systems Methodology |  Operations 8D Problem Solving |  Systems Thinking Current Reality Tree |
|---|---|---|---|---|
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. | Soft Systems Methodology helps explore unclear or politically charged problems systematically. Instead of forcing a quick answer, the method builds a shared understanding of perspectives and room for action. | 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. | A Current Reality Tree condenses many symptoms into a few causal chains. The method makes visible which core problems drive several negative effects at once. |
Complexitysame | High | High | High | High |
Timedifferent | 2-12 Wochen | 0.5-3 Tage | 1-6 Wochen | 2-6 h |
Participantsdifferent | 3-10 | 5-15 | 4-10 | 3-8 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop |
Outputdifferent | Project Charter, Measurement Plan, Cause Analysis, Control Plan | Rich Picture, Root Definitions, Conceptual Models, Change Agenda | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Current Reality Tree, Core Problems, Intervention Ideas |
Tagsno overlap | Continuous improvementQualityProcess improvement | Soft systemsComplexitySensemakingSystems thinking | QualityProblem solvingRoot cause | Systems thinkingRoot causeConstraintsCausality |