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| Criterion |  Operations Barrier Analysis |  Operations Root Cause Analysis |  Agile Affinity Estimation |
|---|---|---|---|
Purposedifferent | 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. | 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. |
Complexitysame | Medium | Medium | Medium |
Timedifferent | 2-4 h | 1-4 h | 30-90 min |
Participantsdifferent | 2-6 | 3-8 | 3-12 |
Formatdifferent | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan | Affinity Size Map, Grouped Estimates, Unclear Items |
Tagsno overlap | Root causeSafetyIncident | Root causeProblem solvingQualityIncident | EstimationBacklogRelative sizing |
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