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- W2894413183 abstract "Abstract We investigate a real-world product distribution problem faced by a fast fashion retailer in Singapore. It is a generalization of the multi-commodity pickup and delivery traveling salesman problem (m-PDTSP) proposed by Hernandez-Perez and Salazar-Gonzalez [15]. Each weekend the retailer forecasts the demand of each product for the next week. To ensure the inventory level equal to the forecast, the retailer schedules a fleet of vehicles to pick up or deliver products from/to each store at the beginning of each week. Shipping products from a store in surplus to another store in shortage is encouraged. For products that cannot be balanced among the stores, they are either picked up or delivered from/to the warehouse, which incurs a handling cost for each unit. The objective is to minimize the total travel distance as well as the total handling cost at the warehouse. To solve this problem, we propose a branch-and-price-and-cut algorithm based on a strong set-partitioning model, where an ad-hoc label-setting algorithm is designed to solve the pricing problem. The algorithm is tested on a set of instances generated according to a real-world database from the retailer and the m-PDTSP benchmark instances. Computational results show that our algorithm can optimally solve instances with 20 stores and over 100 products in one hour computational time. Moreover, it successfully solves several open m-PDTSP benchmark instances to optimality." @default.
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- W2894413183 date "2019-12-01" @default.
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- W2894413183 title "A branch-and-price-and-cut algorithm for a pickup and delivery problem in retailing" @default.
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- W2894413183 doi "https://doi.org/10.1016/j.omega.2018.09.014" @default.
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