Scientific Journal of KubSAU

The research is devoted to the problem of choosing the best methods for assessing the economic efficiency of information technologies. Using the Kemeny median is proposed to solve this problem. This method will allow to obtain the ranking of methods of evaluating of IT effectiveness by various criteria. The existing methods of valuation of economic efficiency of information technology were systematized in the article. Preliminarily, all the methods were divided into three groups: financial, probabilistic and qualitative analysis tools. The advantages and disadvantages of methods, their purpose, use and limitations were also considered. As a result of systematization, it was concluded that there were some limited and one-sided methods. No single method allows to assess comprehensively the effectiveness of an information technology. Obviously, the methods should be considered in the system. But for this they need to be ranked. In order to obtain the ranking the method of Kemeny median was used. In the beginning the expert evaluation of methods by the eight proposed criteria (taking into account the specificity of the original data, validity, unambiguity, information content, exactness, complexity, the access to information, the cost) was carried out. Next, the search of the group ranking was carried. The matrix of losses was compiled. The problem of appointments was solved in MS Excel. At the end, the matrix of paired comparisons has been obtained. This matrix helped to determine the final ranking of alternative methods. Therefore, using the Kemeny median allowed us to prioritize the use of methods of evaluating of the effectiveness of information technology

The research is devoted to the problem of selecting the software acquisition method for the company. To solve this problem the decision support system which allows automating the process of selecting the software acquisition method was developed. The existing methods of software acquisition were reviewed in the article, as well as the analysis of possibility of their comparison was conducted. This analysis showed that the research should be limited to two alternatives - purchase of licensed program and using Software as a Service (SaaS). We substantiated the necessity of a mechanism that would allow the company to determine with a high degree of accuracy which software acquisition method was the most preferred. This mechanism was implemented in the framework of a decision support system consisting of three main blocks: database, model base and interface. The basis of the model base consisted of indicators calculated on the various methods for assessing the economic efficiency of information technologies. The above methods were ranked in descending order of their informativeness. Based on these results the algorithm of choice of software, the acquisition method was proposed. This algorithm formed the basis of the decision support system which block diagram is also presented in the article. It is expected that the developed decision support system will enhance the validity of the decisions made, reduce the complexity of the calculations, and minimize losses associated with acceptance of erroneous decisions