Safety analysis of a multi-phased control system

In the paper we focus on the analysis the efficiency of the control system to ensure the safety by emergency situations. The system is modeled as a multi-phased system. The peculiarity of the considered system is that it supervises a state of a control object and does not make any impact on the object before accident occurrence. After an emergency occurrence the system generates the response for coping with this situation. We propose a measure of the system efficiency for evaluating the system safety. A numerical example illustrates the proposed approach for computing the system efficiency.