truck scheduling in cross docking with multiple receiving and shipping door

cross docking is a logistic strategy that plays the role of a middle knot in distribution network in the provision process. in logistic part, inventory holding is considered as an important matter in managing costs. not only cross docking reduces the inventory holding cost, but it also reduces the cost of collecting received orders, transportation and duration of sending. the products, which are unloaded on cross docking by inbound trucks, are classified properly according to customers’ orders and loaded on outbound trucks with minimum possible saving and as soon as possible, usually less than 24 hours. a model is offered in this paper on the basis of a mixed integer programming to model the cross docking with several receiving and shipping doors. it allocates different doors to inbound and outbound trucks, regards the loading sequences, and also allocates products from importing trucks to exporting ones coincidentally. the proposed model has been implemented in the dairy industry, and the results indicate the effectiveness of the model is presented in the real world.