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Selected:Change AnalysisLASR (Lightweight Approach for Software Reviews)ATAM (Architecture Tradeoff Analysis Method)5 Whys
| Criterion |  Operations Change Analysis |  Architecture LASR (Lightweight Approach for Software Reviews) |  Architecture ATAM (Architecture Tradeoff Analysis Method) |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | For a deviation after a change, the method isolates the influence of the altered condition. It narrows down which differences are relevant and which are just accompanying noise. | 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. | 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 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. |
Complexitydifferent | Medium | Medium | High | Low |
Timedifferent | 45-120 min | 3–4 h for initial assessment; preparation and deeper analysis additional | Several meetings plus preparation and analysis; total effort depends on scope | 15-30 min |
Participantsdifferent | 2-6 | 1 or a small team; particularly suitable for 3–4 people | Evaluation team, architects, and relevant stakeholders | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Change Matrix, Cause Hypotheses, Validation Questions, Action List | 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 | Prioritized quality scenarios in a utility tree, Architecture risks with reasoning and assumptions, Sensitivity and trade-off points, Findings report with open investigations | Root cause notes, Countermeasures |
Tagsno overlap | ChangeRoot causeTroubleshootingComparison | ArchitectureQualityRiskAssessmentLean | ArchitectureQualityRiskTradeoffsStakeholders | Root causeIncidentLeanProblem solving |