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Selected:Root Cause Tree AnalysisFailure Mode and Effects AnalysisA3 Problem SolvingRoot Cause Analysis
| Criterion |  Operations Root Cause Tree Analysis |  Operations Failure Mode and Effects Analysis |  Operations A3 Problem Solving |  Operations Root Cause Analysis |
|---|---|---|---|---|
Purposedifferent | For a problem with several suspected causes, the method builds a causal structure instead of a mere list. It makes visible how causes connect and where the strongest points of leverage lie. | 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. | For a complex deviation with several people involved, the method bundles problem, analysis, and decision onto one page. It creates a shared working space where causes, countermeasures, and follow-up fit together. | 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 | 1-3 h | 2-6 h | 45-90 min | 1-4 h |
Participantsdifferent | 2-8 | 3-10 | 2-5 | 3-8 |
Formatdifferent | Workshop | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Cause Tree, Evidence Notes, Countermeasures | FMEA Table, Risk Priority, Mitigation Actions | A3 Report, Action Plan, Root Cause Analysis | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan |
Tagsno overlap | Root causeTreeIncidentQuality | RiskQualityOperationsRoot cause | LeanProblem solvingCoachingOperations | Root causeProblem solvingQualityIncident |