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Selected:Fault IsolationARID (Active Reviews for Intermediate Designs)ATAM (Architecture Tradeoff Analysis Method)Assumption Mapping
| Criterion |  Engineering Fault Isolation |  Architecture ARID (Active Reviews for Intermediate Designs) |  Architecture ATAM (Architecture Tradeoff Analysis Method) |  Product Discovery Assumption Mapping |
|---|---|---|---|---|
Purposedifferent | In technical failures, the visible symptom often gets mixed up with the actual cause. Fault Isolation narrows the fault space and progressively reduces which part of the system is truly affected. | ARID examines how well developers can work with a technical design. It focuses on a part of the system that can still be revised, between the architecture overview and the detailed specification. | ATAM helps teams weigh architecture decisions when quality goals compete. The team considers business goals, stakeholder expectations, and technical decisions together. The evaluation shows which risks need further investigation. | When assumptions still sit unordered in the room, it weighs uncertainty against leverage. It makes visible which hypotheses should be checked first. |
Complexitydifferent | Medium | Medium | High | Medium |
Timedifferent | 30-180 min | 2–4 h review as a planning range; preparation and evaluation additional | Several meetings plus preparation and analysis; total effort depends on scope | 45-60 min |
Participantsdifferent | 1-6 | Designers, developers as users, and facilitation | Evaluation team, architects, and relevant stakeholders | 2-8 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area | Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions | Prioritized quality scenarios in a utility tree, Architecture risks with reasoning and assumptions, Sensitivity and trade-off points, Findings report with open investigations | Assumption map, Test backlog, Risk ranking |
Tagsno overlap | TroubleshootingDiagnosisEngineering | ArchitectureEngineeringFeedbackValidationTasks | ArchitectureQualityRiskTradeoffsStakeholders | AssumptionsRiskExperimentsValidation |