@ARTICLE{Kharchenko_Vyacheslav_Multi-fragmental_2024, author={Kharchenko, Vyacheslav and Ponochovnyi, Yuriy and Babeshko, Ievgen}, volume={vol. 70}, number={No 1}, journal={International Journal of Electronics and Telecommunications}, pages={211-218}, howpublished={online}, year={2024}, publisher={Polish Academy of Sciences Committee of Electronics and Telecommunications}, abstract={Traditional availability, reliability, and safety models face the dimension problem due to a huge number of components in modern systems, motivating further research in this field. This paper focuses on multi-fragmental and multiphase models for availability and functional safety assessment of the information and control (I&C) systems with two-cascade redundancy considering design faults manifestation during operation. The methodology of the research is based on Markov and semi-Markov chains with the utilization of multi-phase modeling. Several multi-phase models are developed and investigated considering different conditions of operation and failures caused by version faults. The case study of the research is based on the analysis of safety-critical nuclear power plant I&C systems such as the reactor trip systems developed using the programmable platform RadICS.}, type={Article}, title={Multi-fragmental and multi-phase availability models of the safety-critical I&C systems with two-cascade redundancy}, URL={http://www.czasopisma.pan.pl/Content/130712/26-4455-Kharchenko-sk.pdf}, doi={10.24425/ijet.2024.149533}, keywords={safety, availability, reliability, I&C modeling, multi-fragmental models, multi-phase models}, }