Approaches to risk assessment of the functioning of systems of facilities for different purposes

Abstract

The article considers approaches to assessing the risks of systems operation. The main
problems in qualimetric risk assessment are analyzed and highlighted, namely the need for an integrated approach to risk assessment and the importance of assessing not only the functioning of
individual components of the system, but the relationship between them, and the processes
operating in the system. It is proposed to consider the inverse value of reliability as a risk for
qualimetric evaluation. Based on the analysis, it is proposed to divide the risk assessment into two
models of system operation. The first model is represented by such a reliability parameter as
infallibility, and characterizes the development of the system before a critical moment, an event or a
collapse, and the second model is represented by such a reliability parameter as maintainability,
which characterizes the stage of the system functioning after the occurrence of a critical event, and
characterizes the restoration of the system functioning and its adaptation to adverse conditions. A
physical-statistical mathematical model based on the intensity of failures and the probability of
system recovery is proposed as a risk assessment of the functioning of systems. This approach
makes it possible to assess the effectiveness of the implementation, organization and functioning of
the system, and most importantly to manage and improve the functioning of the system at any stage
of the life cycle.