Integrated Impact Model on Critical Infrastructure Safety Related to Its Operation Process Including Operating Environment Threats

The main aim of this paper is to present the general safety analytical models of complex multistate technical systems related to their operation processes including operating environment threats. In the case of critical infrastructure, the determination of its safety function and its risk function, which graph corresponds to the fragility curve are defined. Moreover, its mean lifetime up to the exceeding a critical safety state and the moment when its risk function value exceeds the acceptable safety level and the critical infrastructure and its components intensities of degradation and the coefficients of operation process including operating environment threats influence on the critical infrastructure and its components intensities of degradation are introduced as the other significant safety indicators. The proposed models are given for multistate series, parallel, “m out of n”, consecutive “m out of n: F”, series-parallel, parallel-series, series-“m out of k”, “mi out of li”-series, seriesconsecutive “m out of k: F” and consecutive “mi out of li”: F”-series systems.