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| Criterion |  Operations PDCA Cycle |  Operations Weekly Review |  Operations 8D Problem Solving |  Operations Root Cause Analysis |
|---|---|---|---|---|
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. | In a week with many open loops, the method creates distance from operational noise. It organizes commitments, calendar, and projects so the next week becomes workable. | 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 a problem keeps recurring and the cause stays unclear, the method exposes the underlying mechanism. It separates symptom, guess, and robust explanation from one another. |
Complexitydifferent | Low | Low | High | Medium |
Timedifferent | 1 h bis mehrere Wochen | 30-60 min | 1-6 Wochen | 1-4 h |
Participantsdifferent | 1-8 | 1 | 4-10 | 3-8 |
Formatdifferent | Workshop + async | Async | Workshop + async | Workshop + async |
Outputdifferent | PDCA Log, Experiment Plan, Learning Outcome, Standard Change | Updated Task System, Weekly Focus, Next Actions | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan |
Tagsno overlap | Continuous improvementLeanExperiments | ProductivityExecutionPlanning | QualityProblem solvingRoot cause | Root causeProblem solvingQualityIncident |