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Criterion
Design sheets and interface cards connect to jointly written pseudocode with highlighted unresolved questions.
Architecture
ARID (Active Reviews for Intermediate Designs)
Paper illustration of Barrier Analysis with its method-specific working model.
Operations
Barrier Analysis
Stock and Flow Diagram method illustration showing its working structure
Systems Thinking
Stock and Flow Diagram
Paper illustration of MORT Analysis with its method-specific working model.
Operations
MORT Analysis
Purposedifferent
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.For a risk that can only be managed through multiple layers of protection, the method examines the effectiveness of each barrier. It shows where safeguards are missing, too weak, or fail under real conditions.A Stock and Flow Diagram shows how stocks, inflows, and outflows shape a system over time. It is especially suited when growth, delays, or capacity limits determine the dynamics.For a safety-relevant event or a system with high protection requirements, the method examines where controls failed. It exposes both technical and organizational gaps.
Complexitydifferent
MediumMediumHighHigh
Timedifferent
2–4 h review as a planning range; preparation and evaluation additional2-4 h2-6 hMehrere Tage bis Wochen
Participantsdifferent
Designers, developers as users, and facilitation2-61-62-6
Formatsame
Workshop + asyncWorkshop + asyncWorkshop + asyncWorkshop + async
Outputdifferent
Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisionsBarrier Inventory, Failure Analysis per Barrier, Action BacklogStock and Flow Model, Dynamics Notes, Simulation HypothesesMORT Worksheets, Findings per Branch, Corrective Actions, Systemic Recommendations
Tagsno overlap
ArchitectureEngineeringFeedbackValidationTasks
Root causeSafetyIncident
DynamicsSimulationFeedbackSystems thinking
Root causeSafetySystemicIncident
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