The paper analyzes critical infrastructure in Europe, Asia, the USA and Ukraine (concept, structure, threats and challenges). It is determined that in the context of cyber threats, global digitalization and the need for rapid response to emergencies, there is a need to use modern methods and models of technological process support that provide flexibility, scalability and a high level of reliability. It is determined that modern technological process support is based on a combination of cloud technologies, IIoT, digital twins, big data analytics and cyber protection, critical infrastructure enterprise management, integrated into a single infrastructure of information and communication technologies based on modern network protocols. For critical infrastructure enterprises, the main criterion for selecting IT solutions is to ensure the continuity and stability of technological processes while simultaneously meeting the requirements of reliability, security (confidentiality, integrity, availability (CIA)), scalability and cost-effectiveness. The main methods and models of support (management, monitoring, efficiency assessment) of technological processes, determined as a result of the
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