RA-CPS

Cyber-Physical Systems (CPS) are advanced interconnected systems that are one key characteristic of the emerging trend towards Industry 4.0 in automation engineering. As with any industrial production system, risk analysis is one of the key challenges of the design of CPS. Classical risk analysis exploits several well-known methods for evaluating the dependability and resilience properties of pro-duction systems. However, Industry 4.0 implies that the Industrial CPS (sometimes also called Cyber-Physical Production Systems, or CPPS) are more complex from a structural and behavioral points of view and consist of distributed heterogeneous components. Classical methods cannot adequately describe sophisticated failure scenarios of modern highly dynamic, autonomous, and adaptive Industrial CPS. That is particularly true for Artificial Intelligence, especially Deep Learning, being employed for more broad types of safety-critical applications within systems. It is necessary then to revisit the classical Risk Assessment Methods (RAM) and extend them with the most promising advanced techniques that cover in-creased complexity.

The SI4 project is supported by the Bundesanstalt für Arbeitsschutz und Arbeitsmedizin. The main project goal is to evaluate the applicability of modern model-based RAMs for the analysis of Industrial CPS with machine learning components. Firstly, we will perform an extensive systematic review of the available methods and tools for risk assessment and evaluate the applicability of these methods for Industrial CPS. We will define the list of evaluation criteria. After that, we will assess available risk methods and tools that support these methods. As the second phase of the project, we will carry out an extensive systematic review of modern system modeling paradigms, and model-based risk analysis approaches. We will address two aspects: (i) fault-tolerance of ML components that are becoming integral parts of modern industrial CPS and (ii) application of ML methods to improve the reliability and safety of Industrial CPS. As the final phase of the SI4 project, we will define the criteria catalog for the case study. After that, we will develop the case study industrial CPS according to the defined criteria and evaluate the methods discovered in previous steps of the project.