Building on the well-established paradigm of model-based design of embedded safety-critical systems, which has proven to facilitate early detection of design faults and thus to enhance system quality and reliability, IMoST strives for extending the scope of this design technique to also cover the human operator of such systems and his/her interaction with the system and environment.
Traditional model-based design establishes models of the embedded system and of relevant parts of its technical environment and exploits these for an analysis of their joint dynamics. Due to the current evolution of embedded functionality from embedded control to operator assistance
systems, the overall dynamics is gradually moving towards a human-in-the-loop behavior. As the dynamics of such systems cannot be fully understood without co-modeling and co-analysis of all the agents involved, including the human operator, IMoST addresses a seamless semantic integration of the most appropriate modeling paradigms for those individual agent types. This entails detailed models of human operator behavior —both normative and erratic— in road traffic situations as well as models formalizing multiple viewpoints of embedded system dynamics, and models of the environment as perceived and partially controlled by the embedded system and the human operator. The IMoST enterprise thus involves
1. to establish valid models of human operator behavior in relevant road trafficc situations through a combination of empirical research and deductions from insights of the cognitive sciences,
2. to tightly integrate these with appropriate models of vehicle and environment dynamics and embedded system interaction,
3. so as to facilitate tools supporting full model-based validation, in particular prediction of the safety impact, of operator assistance systems.
This is a first stepping stone towards the joint vision of the partners in the competence network SafeTRANS to address safety of transportation systems through a holistic approach integrating an engineering and a psychological perspective within a comprehensive model-based design framework.
The project is supported by the Ministry of Science and Culture of the state of Lower Saxonia.
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