For a proper estimation of all factors and forecasting of possible costs, a mathematical model for calculating the traction movement deviation at the Kryvyi Rih - Odesa Port Line station from the planned and the dependence of this deviation from the delivery stage is proposed. The estimation of deviations at all stages of transportation using statistical methods allows precisely to qualify such indicator as the quality of transportation.The article considers the possibility to evaluate the quality of cargo delivery with the help of the magnitude of deviations. The annual data concerning the deviation from the scheduled traffic flow are analyzed. The concept of "deviation coefficient" has been introduced, which characterizes the rejection of the arrival time of the train at the station from the planned in relation to the expected deviation.The assessment of the quality of transport services is primarily attributable to the cost-effectiveness of the delivery of the goods. The cost-effectiveness in turn depends on both the cost of transportation, and its speed, reliability, safety, timeliness of delivery and other factors. With the development of technologies, the requirements for the quality of freight transport are constantly increasing, timeliness also plays an important role in assessing the quality of transportation. It affects the speed and reliability of transportation, which increases the competitiveness of customers in the market and allows to reduce additional costs for storage of cargo, loss in transportation, immobilization of inventories from the sphere of production at the time of transportation, possible lowering of production efficiency, etc.
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