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| Criterion |  Operations Fault Tree Analysis |  Facilitation World Café |  Architecture LASR (Lightweight Approach for Software Reviews) |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | For a critical top event with several possible triggers, the method logically models failure paths. It makes visible which combinations of conditions can lead to damage. | When a group needs to connect many viewpoints in a short time, World Café creates a calm alternation between closeness and rotation. It sets thinking in motion without forcing the conversation into full-plenary rigidity. | 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 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 | High | Medium | Medium | Low |
Timedifferent | 2-6 h | 60-180 min | 3–4 h for initial assessment; preparation and deeper analysis additional | 15-30 min |
Participantsdifferent | 3-8 | 12-100+ | 1 or a small team; particularly suitable for 3–4 people | 2-6 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop |
Outputdifferent | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Table Notes, Emergent Themes, Shared Questions | 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 | Root cause notes, Countermeasures |
Tagsno overlap | RiskRoot causeSafety | FacilitationDialogueLarge groupSensemaking | ArchitectureQualityRiskAssessmentLean | Root causeIncidentLeanProblem solving |