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Selected:Root Cause AnalysisRoot Cause Tree AnalysisLASR (Lightweight Approach for Software Reviews)
| Criterion |  Operations Root Cause Analysis |  Operations Root Cause 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. | 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. | 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. |
Complexitysame | Medium | Medium | Medium |
Timedifferent | 1-4 h | 1-3 h | 3–4 h for initial assessment; preparation and deeper analysis additional |
Participantsdifferent | 3-8 | 2-8 | 1 or a small team; particularly suitable for 3–4 people |
Formatdifferent | Workshop + async | Workshop | Workshop + async |
Outputdifferent | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan | Cause Tree, Evidence Notes, Countermeasures | 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 |
Tags1 shared | Root causeProblem solvingQualityIncident | Root causeTreeIncidentQuality | ArchitectureQualityRiskAssessmentLean |
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