安全库存管理.ppt

解：由题意知，?=2加仑/天，L=6天，F(z)=95％，则z=1.65。从而即在满足95％的顾客满意度的情况下，安全库存量是8.08加仑。*举例2提前期变化，需求为常数的情形如果提前期内的顾客需求情况是确定的常数，而提前期的长短是随机变化的，在这种情况下SS为SS=zd?L其中：z—一定顾客服务水平下的安全系数；?L—提前期的标准差；d—提前期内的日需求量。*例题4-3如果在上例中，啤酒的日需求量为固定的常数10加仑，提前期是随机变化的，而且服从均值为6天、标准方差为1.5天的正态分布，试确定95％的顾客满意度下的安全库存量。*举例解：由题意知，?L=1.5天，d=10加仑/天，F(z)=95％，则z=1.65。从而即在满足95％的顾客满意度的情况下，安全库存量是24.75加仑。*举例3需求和提前期都是随机变化的情形在多数情况下，提前期和需求都是随机变化的，此时，我们假设顾客的需求和提前期是相互独立的，则SS为*Copyright?2012BrightConsulting(Wuxi)Co.,LtdCopyright?2012BrightConsulting(Wuxi)Co.,Ltd?2010-2011ManagementLogiXConsultingAllrightsreserved.MakeOperationBrightAchievingyourOperationExcellenceCopyright?2012BrightConsulting(Wuxi)Co.,LtdCopyright?2012BrightConsulting(Wuxi)Co.,Ltd?2010-2011ManagementLogiXConsultingAllrightsreserved.?2010-2011ManagementLogiXConsultingAllrightsreserved.Copyright?2012BrightConsulting(Wuxi)Co.,LtdCopyright?2012BrightConsulting(Wuxi)Co.,Ltd?2010-2011ManagementLogiXConsultingAllrightsreserved.MakeOperationBrightMakeOperationBrightMakeOperationBrightMakeOperationBrightCopyright?2012BrightConsulting(Wuxi)Co.,LtdCopyright?2012BrightConsulting(Wuxi)Co.,Ltd?2010-2011ManagementLogiXConsultingAllrightsreserved.Copyright?2012BrightConsulting(Wuxi)Co.,LtdCopyright?2012BrightConsulting(Wuxi)Co.,Ltd?2010-2011ManagementLogiXConsultingAllrightsreserved.Copyright?2012BrightConsulting(Wuxi)Co.,LtdCopyright?2012BrightConsulting(Wuxi)Co.,Ltd?2010-2011ManagementLogiXConsultingAllrightsreserved.Copyright?2012BrightConsulting(Wuxi)Co.,LtdCopyright?2012BrightConsulting(Wuxi)Co.,Ltd?2010-2011ManagementLogiXConsultingAllrightsreserved.*Copyright?2012BrightConsulting(Wuxi)Co.,LtdCopyright?2012BrightConsulting(Wuxi