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Документ Factor synergy analysis and merger strategy models in investigation of telecommunication operators' performance(Національний технічний університет "Харківський політехнічний інститут", 2020) Malyeyeva, Olga; Kosenko, Viktor; Davydovskyi, Yurii; Boiev, DmitriyThe subject of the study is the process of choosing a strategy to improve the effectiveness of telecom operators, given the trend of growth in multitraffic in data networks. The purpose of the work is to analyze the synergy of factors and develop models of traffic of data networks in the implementation of the strategy of merger of telecommunication operators. The following tasks are solved in the article: analysis of telecommunication development strategies; building a network model of synergistic effect in the implementation of development strategies; development of a model of data flow intensity in the integrated networks. The following research methods are used: statistical and system analysis, cause and effect models, mathematical programming models, and vector matrix models. The following resultsare obtained: The tendencies of development of multiservice services in the sphere of infocommunications are considered. Here are some basic strategies for developing a communications company. It is shown that merger and acquisition strategies are nowadays a means of integrating the necessary resources, contributing to competitive advantage. A mathematical model of linear programming is used to make the decision to invest in development strategies. The task of evaluating the effectiveness of development towards expanding the number of service users is considered. A network model in the form of a cause and effect diagram to investigate the mutual influence of sales factorswas formed. The economic manifestation of the synergistic effect of companies in the implementation of the merger strategy is considered. A multilevel data flow model is used to study the intensities of data flows in a unified network. Conclusions: Due to the increasing volume and heterogeneity of infocommunication network traffic, telecom operators are using merger strategies to pool network management resources. Thus there is a synergistic effect of factors affecting sales of services. The changes in traffic and performance of the consolidated network structure are investigated on the basis of a three-tier hierarchical model. The direction of further research is to simulate network load with different technical structure characteristics to evaluate the effectiveness of a reengineering strategy.Документ Analysis of information-telecommunication network risk based on cognitive maps and cause-effect diagram(НТУ "ХПІ", 2017) Kosenko, Viktor; Malyeyeva, Olga; Persiyanova, Elena; Rogovyi, AntonThe subject matter of the article is the processes of analysis and risk assessment of information and telecommunications networks. The aim is to reduce the potential losses caused by the risks of information and telecommunications network (ITN) functioning by taking timely risk management measures. The objectives are: classification of ITN risks, highlighting the main factors and causes of their occurrence; formation of a systematic presentation of risks to identify their manifestation and consequences; development of the method for assessing the influence of the risk and private risk on probable consequences; obtaining a quantitative risk assessment of ITN. The methods used are: system analysis of risks, method of cognitive maps, cause-and-effect analysis. The following results are obtained: classification of private risks of ITN according to the reasons and the factors of their occurrence is made; the negative consequences affecting the basic characteristics of the operation of ITN are defined; as a result, the structural system model of ITN risks is formed, in which the relationships between the elements of the main aspects of risk are shown; the method based on the theory of causal analysis is suggested in order to quantify the risk impact on ITN functioning. The risk model is based on the construction and analysis of probabilistic or fuzzy cognitive maps. Experts estimate the level of influence of private risks on the characteristics of the network in order to make decisions on risk management. The generalized structure of the cause-effect diagram of the risk factors, manifestation and consequences is developed; on ITN basis the method for quantifying the probability of risk consequences is suggested. The quantitative assessment of probable malfunctioning of the network that is determined by a specific effect (taking into account ITN probability), which is caused by private risks is also made. Conclusion. The suggested approach for quantitative assessment of ITN risk is based on the method of cause-and-effect analysis and enables taking into account both the factors causing it and probable consequences. The obtained results can be used to determine probable failures and losses in ITN functioning on the basis of the information about the degree of risk factors effects, risk events and consequences, and the cause-effect relationships between them. Thus, potential losses can be identified; measures to manage the risks of ITN functioning can be taken.