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| Criterion |  Operations Change Analysis |  Operations 8D Problem Solving |  Engineering Goal Question Metric |  Operations Root Cause Analysis |
|---|---|---|---|---|
Purposedifferent | For a deviation after a change, the method isolates the influence of the altered condition. It narrows down which differences are relevant and which are just accompanying noise. | 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. | Helps clarify technical problems, hypotheses, and next steps in concrete terms. It breaks a technical problem into testable parts. The result is captured as a GQM table and metric briefs. | 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 | Medium | High | Medium | Medium |
Timedifferent | 45-120 min | 1-6 Wochen | 90-180 min | 1-4 h |
Participantsdifferent | 2-6 | 4-10 | 3-6 | 3-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Change Matrix, Cause Hypotheses, Validation Questions, Action List | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | GQM Table, Metric Profiles | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan |
Tagsno overlap | ChangeRoot causeTroubleshootingComparison | QualityProblem solvingRoot cause | MetricsMeasurementEngineeringAlignment | Root causeProblem solvingQualityIncident |