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| Criterion |  Operations 8D Problem Solving |  Operations Root Cause Analysis |  Agile Affinity Estimation |  Operations Barrier 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 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. | When many tasks need to be classified quickly, it sorts them by perceived effort and similarity. It reduces the effort of fine-grained estimation for large volumes. | For a risk that can only be managed through multiple layers of protection, the method examines the effectiveness of each barrier. It shows where safeguards are missing, too weak, or fail under real conditions. |
Complexitydifferent | High | Medium | Medium | Medium |
Timedifferent | 1-6 Wochen | 1-4 h | 30-90 min | 2-4 h |
Participantsdifferent | 4-10 | 3-8 | 3-12 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop + async |
Outputdifferent | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan | Affinity Size Map, Grouped Estimates, Unclear Items | Barrier Inventory, Failure Analysis per Barrier, Action Backlog |
Tagsno overlap | QualityProblem solvingRoot cause | Root causeProblem solvingQualityIncident | EstimationBacklogRelative sizing | Root causeSafetyIncident |