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| Criterion |  Agile T-Shirt Sizing |  Operations Root Cause Analysis |  Operations Barrier Analysis |
|---|---|---|---|
Purposedifferent | When effort only needs to be classified roughly, it makes comparability more important than false precision. It helps sort work quickly into manageable sizes. | 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. | 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 | Low | Medium | Medium |
Timedifferent | 15-45 min | 1-4 h | 2-4 h |
Participantsdifferent | 2-12 | 3-8 | 2-6 |
Formatsame | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Size Buckets, Rough Backlog Map, Split Candidates | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan | Barrier Inventory, Failure Analysis per Barrier, Action Backlog |
Tagsno overlap | EstimationAgileRoadmap | Root causeProblem solvingQualityIncident | Root causeSafetyIncident |
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