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The article deals with the use of computer simulation for the solution of a streamline of transport processes in relation to the cargo rail terminal. The case study is focused on the job sequence problem of transport processes at the rail terminal. The rail terminal serves as a means of the mineral resources delivery support with the necessity of scheduling a lot of means of transport. Unloading time of a wagon with a capacity of 60-70 t based on observations and measurements in practice varies on average from 30 to 45 minutes. Time for unloading the wagons affects their length of stay at the loading track as well as the waiting charges that affect operational efficiency. The problem is related to the utilization of concrete computer simulation system EXTENDSIM for the necessity of simulation and more effectivity of the whole transport system with his processes. The aim of the solution is the practical application of computer simulation for the needs of effective activities of concrete transport processes of a concrete company. The intention is to show the practical role of simulation systems and to use EXTENDSIM as concrete simulation system for the needs of a streamline of transport processes and activities of a concrete company. The objective of this study is to compare the several possibilities of alternative solutions of activity concrete system, which is created from unloading the mineral resources from railway wagons by cyclically working grab and the transport of mineral resources to places of storing. The simulation was performed for different variants of the unloading process. The simulations in this article simulate the process of unloading of ten railway …