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Selected:Causal Factor AnalysisLASR (Lightweight Approach for Software Reviews)Root Cause Tree AnalysisFailure Mode and Effects Analysis
| Criterion |  Operations Causal Factor Analysis |  Architecture LASR (Lightweight Approach for Software Reviews) |  Operations Root Cause Tree Analysis |  Operations Failure Mode and Effects Analysis |
|---|---|---|---|---|
Purposedifferent | For an event with a complicated course, the method breaks down the contributing factors along the timeline. It shows how conditions, decisions, and reactions together produce a course of events. | 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 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. | For a process, product, or service with noticeable failure risks, the method assesses possible failure modes in advance. It directs attention to combinations of occurrence, effect, and detectability. |
Complexitydifferent | High | Medium | Medium | High |
Timedifferent | 2-6 h | 3–4 h for initial assessment; preparation and deeper analysis additional | 1-3 h | 2-6 h |
Participantsdifferent | 3-10 | 1 or a small team; particularly suitable for 3–4 people | 2-8 | 3-10 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop |
Outputdifferent | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions | 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 | Cause Tree, Evidence Notes, Countermeasures | FMEA Table, Risk Priority, Mitigation Actions |
Tagsno overlap | CausalityIncidentRoot causeTimeline | ArchitectureQualityRiskAssessmentLean | Root causeTreeIncidentQuality | RiskQualityOperationsRoot cause |