The main function of the safety stock is securing against the demand variation during the replenishment leadtime.
的安全库存的主要职能是对安全的需求变化，在补充的准备时间。
2
Supervise and update material unit price, supplier information and minimum stock, leadtime of each model for PMC and other documents in purchasing department.
管理并更新材料单价、供应商信息、最小库存、每种材料的采购时间和采购部的其它文件；
3
This part studies two problems: transportation model of delivery stock cost and inventory model for unconfirmed leadtime.