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Selected:Diary StudyFault Tree AnalysisLASR (Lightweight Approach for Software Reviews)Failure Mode and Effects Analysis
| Criterion |  UX Research Diary Study |  Operations Fault Tree Analysis |  Architecture LASR (Lightweight Approach for Software Reviews) |  Operations Failure Mode and Effects Analysis |
|---|---|---|---|---|
Purposedifferent | When experiences build up over days or weeks and a single session cannot capture them, Diary Study records the course of everyday life. Recurring triggers, moods, and habits become visible this way, beyond the sharpness of memory. | 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. | 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 | Medium | High | Medium | High |
Timedifferent | 1-4 Wochen | 2-6 h | 3–4 h for initial assessment; preparation and deeper analysis additional | 2-6 h |
Participantsdifferent | 5-20 | 3-8 | 1 or a small team; particularly suitable for 3–4 people | 3-10 |
Formatdifferent | Async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Diary Entries, Longitudinal Patterns, Experience Timeline | Fault Tree, Critical Paths, Cause Hypotheses, Control 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 | FMEA Table, Risk Priority, Mitigation Actions |
Tagsno overlap | UX researchTrackingBehavior | RiskRoot causeSafety | ArchitectureQualityRiskAssessmentLean | RiskQualityOperationsRoot cause |