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Selected:Fault IsolationLean CanvasARID (Active Reviews for Intermediate Designs)Business Model Stress Test
| Criterion |  Engineering Fault Isolation |  Product Strategy Lean Canvas |  Architecture ARID (Active Reviews for Intermediate Designs) |  Business Strategy Business Model Stress Test |
|---|---|---|---|---|
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. | When an early product bet still has too many open points, it brings target group, problem, and assumptions into a single view. It condenses the idea so core risks become nameable. | 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. | A Business Model Stress Test checks how well a business model holds up under pressure and headwinds. It compares strengths, risks, market logic, and courses of action. The result is captured as a stress-test report and action plan per scenario. |
Complexitydifferent | Medium | Medium | Medium | High |
Timedifferent | 30-180 min | 45-90 min | 2–4 h review as a planning range; preparation and evaluation additional | Half day |
Participantsdifferent | 1-6 | 1-6 | Designers, developers as users, and facilitation | 3-8 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area | Lean Canvas, Core Assumptions, Experiment Backlog | Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions | Stress Test Report, Action Plan per Scenario |
Tagsno overlap | TroubleshootingDiagnosisEngineering | StartupLeanAssumptionsBusiness model | ArchitectureEngineeringFeedbackValidationTasks | StrategyBusiness modelRiskDiagnosis |