Ludmyla Yemchuk

The development features of the information systems and technologies are investigated. The analysis of their impact on the formation of the information society is carried out. The current level of the Ukraine’s development in different directions of the information industry is considered. The advantages and prospects of development of the domestic IT industry are allocated. The role of information systems in the development of an economy that is based on knowledge and information is determined.
The types of information systems and their functionality are considered. The approach for improving the evaluation process in modeling of the information systems and at the enterprise is developed. It creates the conditions for taking into account all the costs during the process of information technology implementation, also in relation to the dynamic process of value changes to support the functioning of the enterprise information system

Today Ukrainian business entities operate in conditions of macroeconomic instability, environmental disturbance, energy dependence on risk of instable and interrupted supply and high cost of energy resources, excessive energy consumption and inefficient use of fuel and energy resources, which requires immediate actions as for finding solutions to ensure energy security. The goal of the article is to solve multi-criteria tasks focused on making managerial decisions regarding the development of enterprise energy security system based on evaluation of influence of numerous factors. As a result of this study, main components of energy security of the enterprise and most important influence factors are determined. The mathematical model of the hierarchy of factors in terms of their influence on the energy security of the enterprise with the use of graph theory is developed. Use of iterative procedure to determine the levels of hierarchy of factors allowed to assess the importance/priority of their influence on energy security of the enterprise. Thus, the developed model of hierarchy of factors based on the applied scientific and methodical approach to determine their influence on energy security of the enterprise provides the opportunity to get a detailed idea of factors interaction, interconnections and influence on energy security of the enterprise, which ultimately leads to elaboration of complex optimal/agreed managerial decisions in context of development and implementation of energy security system of the enterprise.