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Selected:5 WhysBarrier AnalysisLASR (Lightweight Approach for Software Reviews)Failure Mode and Effects Analysis
| Criterion |  Operations 5 Whys |  Operations Barrier Analysis |  Architecture LASR (Lightweight Approach for Software Reviews) |  Operations Failure Mode and Effects Analysis |
|---|---|---|---|---|
Purposedifferent | 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. | For a risk that can only be managed through multiple layers of protection, the method examines the effectiveness of each barrier. It shows where safeguards are missing, too weak, or fail under real conditions. | 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 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 | Low | Medium | Medium | High |
Timedifferent | 15-30 min | 2-4 h | 3–4 h for initial assessment; preparation and deeper analysis additional | 2-6 h |
Participantsdifferent | 2-6 | 2-6 | 1 or a small team; particularly suitable for 3–4 people | 3-10 |
Formatdifferent | Workshop | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Root cause notes, Countermeasures | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | 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 | FMEA Table, Risk Priority, Mitigation Actions |
Tagsno overlap | Root causeIncidentLeanProblem solving | Root causeSafetyIncident | ArchitectureQualityRiskAssessmentLean | RiskQualityOperationsRoot cause |