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| Criterion |  Agile Affinity Estimation |  Operations Failure Mode and Effects Analysis |  Operations Root Cause Analysis |
|---|---|---|---|
Purposedifferent | 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 process, product, or service with noticeable failure risks, the method assesses possible failure modes in advance. It directs attention to combinations of occurrence, effect, and detectability. | 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 |
Timedifferent | 30-90 min | 2-6 h | 1-4 h |
Participantsdifferent | 3-12 | 3-10 | 3-8 |
Formatdifferent | Workshop | Workshop | Workshop + async |
Outputdifferent | Affinity Size Map, Grouped Estimates, Unclear Items | FMEA Table, Risk Priority, Mitigation Actions | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan |
Tagsno overlap | EstimationBacklogRelative sizing | RiskQualityOperationsRoot cause | Root causeProblem solvingQualityIncident |
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