Supply Chain Logistics Problem Dataset

Dataset is divided into 7 tables, one table for all orders that needs to be assigned a route – OrderList table, and 6 additional files specifying the problem and restrictions. For instance, the FreightRates table describes all available couriers, the weight gaps for each individual lane and rates associated. The PlantPorts table describes the allowed links between the warehouses and shipping ports in real world. Furthermore, the ProductsPerPlant table lists all supported warehouse-product combinations. The VmiCustomers lists all special cases, where warehouse is only allowed to support specific customer, while any other non-listed warehouse can supply any customer. Moreover, the WhCapacities lists warehouse capacities measured in number of orders per day and the WhCosts specifies the cost associated in storing the products in given warehouse measured in dollars per unit. Order ID is ID of the order made by the customer, product ID is the specific product ID customer ordered. "tpt_day_cnt" in the FrieghtRates table means transportation day count, i.e. estimated shipping time. Questions: There is a Carrier V44_3 in OrderList table, but it is missing in the FreightRates table? V44_3 is a carrier that was historically used for supplying given demand, but since it has been discontinued and therefore do not appear in the Freight Rates List. Also, all of the V44_3 instances are CRF - i.e. customer arranges their own shipping and hence cost is not calculated either way.

本数据集共划分为7张数据表，其中一张为所有待分配路线的订单表——OrderList（订单列表）表，剩余6张附加文件用于明确问题边界与约束条件。例如，FreightRates（运费表）描述了所有可用的承运商、各专属线路的重量区间及对应运费标准。PlantPorts（工厂港口表）阐述了现实中仓库与货运港口之间的合法接驳关系。ProductsPerPlant（工厂产品表）罗列了所有受支持的仓库-产品组合。VmiCustomers（供应商管理库存客户表）列出了所有特殊场景：仅允许指定仓库为特定客户供货，未列入本表的仓库则可向任意客户供货。此外，WhCapacities（仓库产能表）以每日订单总量为单位，标注了各仓库的产能上限；WhCosts（仓库成本表）则指定了在对应仓库存储产品的单位成本，单位为美元每件。订单ID（Order ID）为客户发起的订单唯一标识，产品ID（product ID）为客户订购的特定产品编号。运费表中的"tpt_day_cnt"代表运输天数，即预估的货运时长。问题：存在异常情况：订单列表表中出现了承运商V44_3，但该承运商并未出现在运费表中。V44_3是历史上用于满足对应需求的承运商，但由于该服务已终止，因此未被纳入运费列表。此外，所有涉及V44_3的订单均采用CRF模式，即由客户自行安排货运，因此无需核算相关运输成本。