tivariate degradation system[J]. Journal of ShangР[2] Zhang Minjie. The construction and application of the Hai Jiao Tong University,2021,55:858-867Р simulation model based on selective ordering policy[J]. [6] Lu H, Wang H W, Li F, et al. Integrated scheduling andР Technological Development of Enterprise,2010,29(9):5-7 material supply planning under nonstationary stochasticР[3] Meiyan Chen. Optimal Ordering Strategies and Financing demand and random supply yield[J].Systems Engineering-РР Theory & Practice,2019,39(3):647-658 ▲Р Strategies Based on EOQ Model[A]. Singapore Man- C EР agement and Sports Science Institute,Singapore, Infor-