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Selected:Fault IsolationRisk StormingRiskiest Assumption TestARID (Active Reviews for Intermediate Designs)
| Criterion |  Engineering Fault Isolation |  Architecture Risk Storming |  Product Discovery Riskiest Assumption Test |  Architecture ARID (Active Reviews for Intermediate Designs) |
|---|---|---|---|---|
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. | Helps clarify architecture context, options, and consequences in concrete terms. It organizes technical context, alternatives, and consequences. The result is captured as an Annotated Diagram, a Prioritized Risk List, and an Action Backlog. | When an idea hinges on one critical unknown, it prioritizes testing that exact piece of uncertainty first. It separates problem, assumption, solution, and evidence. The result is captured as a prioritized list of assumptions, a test plan, and a result report. | 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. |
Complexitydifferent | Medium | Low | Medium | Medium |
Timedifferent | 30-180 min | 60-90 min | 1-2 Wochen pro Iteration | 2–4 h review as a planning range; preparation and evaluation additional |
Participantsdifferent | 1-6 | 4-12 | 2-6 | Designers, developers as users, and facilitation |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area | Annotated Diagram, Prioritized Risk List, Action Backlog | Prioritized Assumption List, Test Plan, Results Report | Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions |
Tagsno overlap | TroubleshootingDiagnosisEngineering | RiskArchitectureWorkshopValidation | ExperimentsValidationDiscoveryAssumptions | ArchitectureEngineeringFeedbackValidationTasks |