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| Criterion |  Operations PDCA Cycle |  Operations A3 Problem Solving |  Innovation TRIZ |  Operations 5 Whys |
|---|---|---|---|---|
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 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. | For technical contradictions or trade-offs, the method looks for solutions that resolve opposing requirements at the same time. It translates limits into an explicit picture of conflict that becomes workable. This produces not just compromises but more elegant principles. | 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. |
Complexitydifferent | Low | Medium | High | Low |
Timedifferent | 1 h bis mehrere Wochen | 45-90 min | 1-4 h | 15-30 min |
Participantsdifferent | 1-8 | 2-5 | 2-8 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | PDCA Log, Experiment Plan, Learning Outcome, Standard Change | A3 Report, Action Plan, Root Cause Analysis | Contradiction Statement, Inventive Principles, Solution Concepts | Root cause notes, Countermeasures |
Tagsno overlap | Continuous improvementLeanExperiments | LeanProblem solvingCoachingOperations | InnovationProblem solvingContradictionsCreativity | Root causeIncidentLeanProblem solving |