Journal
COMPUTERS & INDUSTRIAL ENGINEERING
Volume 139, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.cie.2019.106134
Keywords
Logistics; Cross docking; Truck scheduling; Simulated annealing; Reinforcement learning
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In this paper, a truck scheduling problem at a cross-docking center is investigated where inbound trucks are also used as outbound. Moreover, inbound trucks do not need to unload and reload the demand of allocated destination, i.e. they can be partially unloaded. The problem is modeled as a mixed integer program to find the optimal dock-door and destination assignments as well as the scheduling of trucks to minimize makespan. Due to model complexity, a hybrid heuristic-simulated annealing is developed. A number of generic and tailor-made neighborhood search structures are also developed to efficiently search solution space. Moreover, some reinforcement learning methods are applied to intellectually learn more suitable neighborhood search structures in different situations. Finally, the numerical study shows that partial unloading of compound trucks has a crucial impact on makespan reduction.
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