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| Criterion |  Operations 5 Whys |  Architecture Risk Storming |  Operations Root Cause Analysis |  Architecture ATAM (Architecture Tradeoff Analysis Method) |
|---|---|---|---|---|
Purposedifferent | For a single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description. | Helps clarify architecture context, options, and consequences in concrete terms. It organizes technical context, alternatives, and consequences. The result is captured as an Annotated Diagram, a Prioritized Risk List, and an Action Backlog. | 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. | ATAM helps teams weigh architecture decisions when quality goals compete. The team considers business goals, stakeholder expectations, and technical decisions together. The evaluation shows which risks need further investigation. |
Complexitydifferent | Low | Low | Medium | High |
Timedifferent | 15-30 min | 60-90 min | 1-4 h | Several meetings plus preparation and analysis; total effort depends on scope |
Participantsdifferent | 2-6 | 4-12 | 3-8 | Evaluation team, architects, and relevant stakeholders |
Formatdifferent | Workshop | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Root cause notes, Countermeasures | Annotated Diagram, Prioritized Risk List, Action Backlog | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan | Prioritized quality scenarios in a utility tree, Architecture risks with reasoning and assumptions, Sensitivity and trade-off points, Findings report with open investigations |
Tagsno overlap | Root causeIncidentLeanProblem solving | RiskArchitectureWorkshopValidation | Root causeProblem solvingQualityIncident | ArchitectureQualityRiskTradeoffsStakeholders |