Inventory lot-sizing with supplier selection under non-stationary stochastic demand
针对非平稳随机需求，提出一个整数线性规划模型，同时考虑全单位数量折扣和满足率约束，通过实验分析满足率要求和需求变异系数对成本、库存水平和订单分配的影响。
Inventory lot-sizing and supplier selection problem has been studied in the literature considering mainly time-varying deterministic demand. However, in real life, most of the products exhibit non-stationary stochastic demand. In this context, we propose an integer linear programming model for inventory lot-sizing and supplier selection problem under non-stationary stochastic demand with all-units quantity discounts and fill rate constraints. Through detailed analysis of experimental results, we show the impacts of fill rate requirements and demand coefficient of variation on costs, inventory levels and order allocations.