Bayesian Networks' Development Based on Noisy-MAX Nodes for Modeling Investment Processes in Transport Volodymyr Lytvynenko 1[0000-0002-1536-5542] , Nataliіa Savina 2[0000-0001-8339-1219] , Jan Krejci 3 [0000-0003-4365-5413] , Mariia Voronenko 1[0000-0002-5392-5125 ] , Maryna Yakobchuk 2[ 0000-0003- 1587-1370] , Olena Kryvoruchko 2[000-0002-5426-7347] 1 Kherson National Technical Unіversity, Kherson, Ukraine, 2 National University of Water and Environmental Engineering, Rivne, Ukraine, 3 Jan Evangelista Purkyne University in Usti nad Labem, Czech Republic, immun56@gmail.com, mary_voronenko@i.ua, n.b.savina@nuwm.edu.ua, 2marysa2@ukr.net, o.p.kryvoruchko@nuwm.edu.ua, jan.krejci@ujep.cz Abstract. This article focuses on the use of Bayesian networks for analyzing the growth relationship of Ukraine's gross domestic product (GDP) from the volume of investment in the transport industry and offers a comparative description of the use of different structural training algorithms. It is shown that Noisy-max nodes as compared to General nodes provide relatively high initial accuracy. General nodes require a repeated validation procedure. When using the Hirerical sampling method, the accuracy of the network result with General nodes re- mains unchanged, and with Noisy-max nodes, it increases (in our case, by 12.32%). However, Noisy-max nodes entail an increase in time and computa- tional costs. Keywords: Transport industry; General nodes; Noisy-max nodes; Bayesian networks; Structural learning; Parametric learning; Sensitivity analysis; Valida- tion. 1 Introduction Successful implementation of the investment policy will contribute to the implemen- tation of one of the main country's economy tasks to increasing the number of main domestic investment resources sources. This will create the necessary prerequisites for the production growth and expanded reproduction of GDP in order to increase the population's well-being. Therefore, it would be advisable to determine the informative investment indica- tors that have the greatest impact on the dynamics of Ukraine’s GDP. It is necessary to develop a model of the relationship between capital investment and GDP.