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Selected:Root Cause AnalysisRoot Cause Tree AnalysisLASR (Lightweight Approach for Software Reviews)8D Problem Solving
| Criterion |  Operations Root Cause Analysis |  Operations Root Cause Tree Analysis |  Architecture LASR (Lightweight Approach for Software Reviews) |  Operations 8D Problem Solving |
|---|---|---|---|---|
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. | For an acute quality or delivery problem, the method structures immediate protection and root cause work together. It keeps the situation stable while the actual cause is investigated cleanly. |
Complexitydifferent | Medium | Medium | Medium | High |
Timedifferent | 1-4 h | 1-3 h | 3–4 h for initial assessment; preparation and deeper analysis additional | 1-6 Wochen |
Participantsdifferent | 3-8 | 2-8 | 1 or a small team; particularly suitable for 3–4 people | 4-10 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | 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 | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan |
Tags1 shared | Root causeProblem solvingQualityIncident | Root causeTreeIncidentQuality | ArchitectureQualityRiskAssessmentLean | QualityProblem solvingRoot cause |