Development of a Formal Model of the Research of Methods for Determining the Reliability of Information Systems

The state of reliability is the main indicator of the stable functioning of the information system. Reliability assessment is a complex indicator that consists of four groups of properties, namely: durability, reliability, maintainability and complex indicators. In turn, the reliability properties are composed of indicators of each of the properties. It is on the basis of these indicators that the reliability of the information system used or designed. The stable functioning of information systems largely depends on the reliable operation of technical components of the system, both physical and software. The reasons that suggest an increased interest in the problems of determining the reliability of information systems are: increasing the complexity of the hardware of information systems and the emergence of highperformance information systems; slow growth in the level of reliability of its components; increasing the significance of the hardware work implemented; complexity of the conditions of use, etc. In practice, probabilistic, dynamic, predictive, and static models for determining the reliability of information systems are used to assess reliability. Each of these methods uses the presented reliability indicators as the basis for determining its reliability assessment. The concepts of information system and reliability are presented. Models and methods for determining the reliability of information systems are analysed. Criteria for the development of a formal model of research methods for evaluating the reliability of information systems are defined. A formal model has been developed for the study of methods for determining the reliability of information systems.