CONTAINER TERMINAL STACK MANAGEMENT STRATEGY

The problem of managing the stack of a container terminal is the topic of many domestic and foreign studies. Despite this, the optimal solution in the form of a unified and justified operational strategy has not been found yet. In this paper, one of the particular issues is explored, namely the influence of allocation of the stack height over slots relative to the average value. The relevance of this issue is explained by the fact that the size of the warehouse of a container terminal is traditionally designed to store a certain maximum number of containers. The practice of modern container terminals shows that most of the time the actual storage volume in the warehouse is within 50-70 % of the maximum capacity of a one-time location of containers at the terminal, and approaching 80 % occupancy is considered an alarming operational situation. But in case of incomplete occupancy of the container site, the issue about the optimal strategy for forming the stacks, which minimizes the laboriousness of processing the cargo traffic passing through the warehouse, arises. The parameter characterizing the indicated laboriousness is the average number of movements required to retrieve a container from a stack. In the paper, a storage strategy, which ensures the minimum laboriousness of selecting containers for a given storage volume, is analytically substantiated, as a result, it becomes possible to give reasonable recommendations on the containers arrangement in a stack when the terminal is not fully loaded. An analytical solution to the problem, including quantities such as storage height, number of movements and the distribution of containers by slots, is firstly considered. Further, the use of the statistical modeling method, which makes it possible to take into account the features caused by the scatter of physical and technological parameters, is substantiated and described. A description of using the simulation modeling methods that confirm the practical significance and adequacy of the proposed approach is considered at the end.

terminal, freight traffic, containers, warehousing, laboriousness, mathematical modeling, statistical modeling, slot, height of the stack

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