Simulation and Analysis of Socio-Technical Risk Using SpecTRM

We propose to create model-based simulation and analysis tools for risk management throughout the system life cycle. Rather than using traditional approaches based on failure events in static engineering designs, we will treat a system as a dynamic process that is continually adapting to achieve its ends and to react to changes in itself and its environment. The original design must not only enforce appropriate constraints on behavior to ensure safe operation, but the system must continue to operate safely as changes occur. The process leading up to an accident (loss event) can be described in terms of an adaptive feedback function that fails to maintain safety as performance changes over time to meet a complex set of goals and values. Using this definition of risk management, we will extend our commercial system engineering tool set to include model-based simulation and analysis of risk throughout the system life cycle, including complex human decision-making, software errors, system accidents (versus component failure accidents), and organizational risk factors.