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The development of the System Architecture of the IT-infrastructure focused on the use of modern Data Centers is considered. At the same time, it is envisaged to create components that describe: general approaches to building a system architecture; IT-services – information technologies that solve the task of providing IT-services; logical model of IT-infrastructure. Formulated logic of IT-infrastructure construction: IT-infrastructure architectures define a set of services. IT-services are provided to three groups of clients. IT-services and clients are connected by 5 implementation scenarios. The integration of IT-services is determined by 5 architectures. As IT-services, we understand information technologies aimed at maintaining the following elements in a technically good state: network devices, computing equipment, data storage devices, automatic software deployment services, network services, perimeter protection services, directory services, file and print services, data management services, business application services, IT-management services, archiving and recovery services, certificate management services, integration services. Architectures define the fundamental principles of building IT-services and their relationship. Also, requirements for the creation of IT-services are formed on the basis of the architecture. One of the most important architectures is architecture of IT-infrastructure management. The architecture of the management system ensures the necessary level of IT-services of the Data Center due to the organization of three components – personnel, processes, technologies. The tasks of the architecture are: use of processes and information technologies to identify and minimize failures of IT-services; ensuring a high degree of integration of information technologies; ensuring response to changes in system parameters and performance of service functions in real time. As an example, the management function of the IT-service “network administration” (monitoring and control of configuration management services, coordination of changes, remote management and debugging) is considered. The algorithmic synthesis of programs and devices network management is considered, which consists in the construction of a functional scheme of control devices in two stages – abstract and structural synthesis, and all the steps of its solution and subsequent hardware synthesis are determined.

The article offers approaches to building a business model of IT management at an enterprise that deals with the tasks of nature management, taking into account the needs of departments in modern service-oriented information technologies. To increase the efficiency of IT implementation in the enterprise, it is proposed to use the COBIT 5 methodology, which helps companies to achieve optimal efficiency from IT implementation, maintaining a balance between receiving benefits and risks and resources optimizing. The implementation of the methodology will provide an opportunity to manage and control IT throughout the enterprise, both in the field of functional responsibility of IT and business, and also allows to take into account the IT needs of internal and external stakeholders. However, each company must build its own purpose, specifying and detailing it in accordance with the balanced performance maps (finance, customer, internal management and training and development), in addition, performed the task of effective IT implementation associated with development priorities of business. In this case, the task of approving the decision is multi-criteria. Therefore, special attention deserve issues as finding reasons of such multicriteria and the possibility of using appropriate mathematical methods for the purpose of the cascade. The next reason for the multicriteria of decision-making tasks is the influence of time and space. The concrete implementation of decision-making principles is offered in the form of algorithms or procedures for solving multicriteria optimization problems. Almost all known approaches to solving these problems involve their scalarization. Thus one of the main issues is the list of preferences of the person who makes decisions in choosing the best solution. In accordance with this principle, the methods of solving problems of multicriteria optimization will be classified according to the characteristics of the information: decision-making under conditions of certainty; decision-making in the absence of information about the system of preference of the decision-maker; decision-making in the conditions of gradual receipt of information about the system of preference of the decision-maker.