Abstract
AbstractThis paper presents reliability and availability analysis of critical infrastructure consisting of eleven interdependent systems. With use of multistate approach to analysis, we assumed that the deterioration of one of the systems affects the reliability of other systems and the entire infrastructure. Under this assumption, the critical infrastructure reliability function and basic reliability characteristics were determined. Additionally, the infrastructure availability function was determined, assuming that infrastructure renewal is carried out when its reliability falls below a certain level. Furthermore, we conducted the reliability and availability analysis of critical infrastructure, taking into account additional load on individual infrastructure systems at certain time points. We assumed that due to external factors, the deterioration of reliability and availability of particular systems is caused by crisis situation related to additional load on the system. The summary contains conclusions coming out of the analysis and comparison for various additional load levels.KeywordsCritical infrastructureDependent systemsInterdependenciesReliabilityInfrastructure renewalAvailabilityCrisis Management
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