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| Criterion |  Operations 8D Problem Solving |  Engineering Hypothesis-Driven Troubleshooting |  Innovation TRIZ |  Operations Root Cause Analysis |
|---|---|---|---|---|
Purposedifferent | 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 systems fail unexpectedly, spontaneous attempts often produce more noise than insight. Hypothesis-driven Troubleshooting translates symptoms into testable assumptions and makes troubleshooting learnable. | 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. | 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 | High | Medium | High | Medium |
Timedifferent | 1-6 Wochen | 30-240 min | 1-4 h | 1-4 h |
Participantsdifferent | 4-10 | 1-6 | 2-8 | 3-8 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Hypothesis Log, Test Plan, Evidence Notes, Diagnosis Summary | Contradiction Statement, Inventive Principles, Solution Concepts | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan |
Tags1 shared | QualityProblem solvingRoot cause | TroubleshootingProblem solvingDiagnosis | InnovationProblem solvingContradictionsCreativity | Root causeProblem solvingQualityIncident |