A two-stage supply chain problem with fixed costs - 2018/12

The two-stage supply chain problem with fixed costs consists of designing a minimum distribution cost configuration of the manufacturers, distribution centers and retailers in a distribution network, satisfying the capacity constraints of the manufacturers and distribution centers to meet the retailers’ specific demands.

This set of instances is used in the computational experiments and were generated randomly and belong to three classes of problems: smaller which consists of 2 plants, 5 distribution centers and 10 retailers, medium which consists of 4 plants, 8 distribution centers and 15 retailers and larger which consists of 6 plants, 10 distribution centers and 20 retailers.

带固定成本的两阶段供应链问题，旨在构建分销网络（distribution network）中制造商、配送中心（distribution center）与零售商（retailer）的最小分销成本配置方案，需满足制造商与配送中心的容量约束，以匹配零售商的特定订货需求。
本实例集用于开展计算实验，均通过随机方式生成，共分为三类问题：小规模类包含2个工厂（plant）、5个配送中心及10个零售商；中规模类包含4个工厂、8个配送中心及15个零售商；大规模类包含6个工厂、10个配送中心及20个零售商。