Перегляд за Автор "Medvedieva, Olena"

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Construction of a portfolio formation method by configuring project-candidates based on flow characteristics
(Technology Center, 2020) Rach, Valentyn; Abdulkadir, Kabir; Medvedieva, Olena; Biriukov, Oleg; Rossoshanska, Olha; Рач, Валентин Анатолійович; Медведєва, Олена Михайлівна; Россошанська, Ольга Валентинівна
A method for portfolio formation, based on the logical methodological technique for configuring projects-candidates, which are represented by the S-curves of a cost flow and expected results, has been proposed. The application of the technique makes it possible to present a portfolio as continuously going processes of accumulation of potential attractiveness of different combinations of projects rather than a static totality of projects. Configuring has been shown to allow finding such a sequence of the mutual location of projects within a portfolio, in which the criterion, taking into account different types of the flow, reaches a maximum value. Using the S-curves makes it possible to account for changes in the indicators of flows that depend on the time of starting a project in the portfolio and affect its attractiveness. The developed model of portfolio formation, the system-creating factor of which is the configuring technique, revealed the relations between its structural elements, which made it possible to identify the essence of the criterial attractiveness indicator and a portfolio configuration criterion. In calculating attractiveness, the proposed technique for the S-curve coagulation procedure, which implies the discounting of cumulative flows, was used. This coagulation enables obtaining an integral indicator that takes into account the specific features of particular S-curves and opens up the possibility of using any type of flows in the problems of assessing and comparing projects and portfolios. Based on the attractiveness indicator and the use of a procedure for rationing the discounted cumulative flows, a portfolio-forming criterion has been developed. It was established that the criterion adequately reflects a greater attractiveness of projects with a decreasing character of costs and less funding time at the same parameters for the expected results. This fact has been proven by the results of computer simulation. In addition, it was confirmed that the constructed method makes it possible to take into account the strategic importance of a project, the specificity of a portfolio financing schedule, as well as the specific features in the character of changes in a project cost and the expected project result. © 2020, V. Rach, K. Abdulkadir, O. Medvedieva, O. Biriukov, O. Rossoshanskaya.
Method for configuring the composition of a project team based on the criteria of subjective well-bein
(Technology Center, 2019) Rach, Valentyn; Osakwe, Ikenna; Medvedieva, Olena; Rossoshanskaya, Olha; Borulko, Natalia; Рач, Валентин Анатолійович; Медведєва, Олена Михайлівна; Россошанська, Ольга Валентинівна
The method for configuring a project team by the criterion of subjective well-being was developed. The method is aimed at searching for such a configuration of candidates at which a team with high commonality is formed based on the importance of values (factors) of subjective well-being and their actual satisfaction at the moment of team formation. The method is based on two conceptual provisions-axioms. Firstly, the most appropriate results of construction of a personal profile are achieved during self-analysis of the attitude of a candidate to indicators of subjective well-being. Secondly, ranking makes it possible to construct a series, in which the least achieved indicators act as the most important. On this basis, it seems possible to compare profiles of candidates with each other and identify the most similar ones. It was theoretically substantiated that the configuration of the closest profiles is a prerequisite for the formation of a positive working environment as a necessary factor for comfortable interaction of team members and a significant integrating factor of involvement in a project. The developed method of the construction of a candidate's personal profile ensures necessary accuracy and increases reliability of obtained information. Two "working zones" of a personal profile (first five and the following seven comprising 27 indicators) that determine close profiles of candidates were identified empirically. The indicators of the overall total rank for indicators of zones and the team coherence coefficient were introduced to compare the profiles. To interpret the value of coherence coefficient in the empirical way, the evaluation scale from seven interval zones for the teams consisting of two to ten participants was constructed. Its effectiveness and adequacy were proved based on the results of experimental testing, the possibility of using the criterion of subjective well-being as a parameter for the formation of project teams. © V. Rach, I. Osakwe, O. Medvedieva, O. Rossoshanska, N. Borulko, 2019.
System modelling of development of innovative project-oriented enterprises
(Sumy State University, 2019) Rach, Valentyn; Rossoshanska, Olga; Medvedieva, Olena; Yevdokymova, Alona; Рач, Валентин Анатолійович; Медведєва, Олена Михайлівна; Россошанська, Ольга Валентинівна
The article summarizes the arguments and counterarguments within the scientific discussion on the quantification of various spheres of enterprise activity based on their system representation. The main purpose of the study is to improve the basic model of systemic economics as the basis for developing a method for quantitative assessment of the harmonious process of development of innovative project-oriented enterprises. Systematization of literary sources and approaches to solving the problem of choosing a basic model has shown that the most reasonable and developed approach is based on the model of the economic tetrad. Various authors used the model when developing indicators of balance and stability of economic systems. However, the known results were not compared, and the model was not used to describe the innovative development of enterprises. The urgency to solve this scientific problem is in the fact that in the era of knowledge economy, innovation development is becoming one of the main directions of activity of modern enterprises, which needs the scientific ground. Studying of the point related to creation of a method for quantitative assessment of the innovative project-oriented enterprises development is carried out in the following logical sequence: making the economic tetrad matching requirements of the system integrity and completeness; conducting an analysis of resource interchange in the triad of the economic tetrad; revealing the essence of the mechanism for managing processes of growth and development of enterprises; developing a mathematical apparatus to describe the dynamic structural changes of enterprises; conducting a computer experiment using five different approaches to calculating the indicators of dynamic structural changes during the introduction of innovations; conducting a comparative analysis of the results. The methodical toolkit of the research considers the postulates of systematicity, scale, harmony, and positions of qualitative mathematics and the triple convolution method. The object of the study is the selected phases of the innovation project life cycle since they determine the peculiarities of the dynamic structural changes of enterprises during the introduction of innovations. The article presents the results of the empirical analysis, carried out based on computer modelling of the innovation project implementation within six different approaches. This showed a fundamentally different nature of the change in structural balance indicators for these approaches. The study theoretically proves and empirically confirms that the proposed indicator of the internal coherence of opposite actions (chaotic and organized) corresponds to the logic of the harmonious implementation of innovation activity. The results of the study can be applied when creating monitoring and management systems for the development of innovative project-oriented enterprises.