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Selected:Root Cause AnalysisATAM (Architecture Tradeoff Analysis Method)Family Tree AnalysisLASR (Lightweight Approach for Software Reviews)
| Criterion |  Operations Root Cause Analysis |  Architecture ATAM (Architecture Tradeoff Analysis Method) |  Operations Family Tree Analysis |  Architecture LASR (Lightweight Approach for Software Reviews) |
|---|---|---|---|---|
Purposedifferent | 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. | For a series of incidents with a similar pattern, the method arranges individual events as branches of a common origin. It makes visible which conditions keep recurring. | LASR helps development teams identify where their software falls short of important quality goals and which improvements to consider. A small group with existing system knowledge can make an initial assessment and investigate open questions in more detail. |
Complexitydifferent | Medium | High | Medium | Medium |
Timedifferent | 1-4 h | Several meetings plus preparation and analysis; total effort depends on scope | 2-4 h | 3–4 h for initial assessment; preparation and deeper analysis additional |
Participantsdifferent | 3-8 | Evaluation team, architects, and relevant stakeholders | 2-6 | 1 or a small team; particularly suitable for 3–4 people |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | 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 | Family Tree Diagram, Pattern Notes, Systemic Measures | Lean Mission Statement describing the software’s purpose, Prioritized quality goals and evaluation criteria, Risks and estimated gaps against quality goals, More closely examined findings and open checks |
Tagsno overlap | Root causeProblem solvingQualityIncident | ArchitectureQualityRiskTradeoffsStakeholders | Root causePatternsIncidentSystemic | ArchitectureQualityRiskAssessmentLean |