A yard storage strategy for minimizing traffic congestion in a marine container transshipment hub |
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Authors: | Yongbin Han Loo Hay Lee Ek Peng Chew Kok Choon Tan |
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Affiliation: | (1) Department of Industrial and Systems Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore, 119260, Singapore |
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Abstract: | This paper studies a storage yard management problem in a transshipment hub where the loading and unloading activities are
both heavy and concentrated. In order to reduce the number of reshuffles, which helps to reduce the vessel turnaround time,
the port operator uses the consignment strategy to group export and transshipment containers according to their destination
vessel. To reduce the potential traffic congestion of prime movers, a high–low workload balancing protocol is used. A mixed
integer programming model is formulated to determine the storage locations of incoming containers, the number of incoming
containers and the smallest number of yard cranes to deploy in each shift. An iterative improvement method is developed to
solve the problem, in which a tabu search based heuristic algorithm is used to generate an initial yard template, and then
the generated yard template is improved by an improvement algorithm iteratively until an optimal or a satisfactory solution
is obtained. Experiment results show that the proposed method can generate excellent results within a reasonable time, even
for the extreme cases. |
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Keywords: | Port operation Yard template Mixed-integer programming Consignment High– low workload balancing protocol |
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