一种基于Weibull分布的库存控制策略

Research on controlling strategy of inventory based on Weibull distribution

在分析大量库存信息的基础上,提出一种基于Weibull分布的库存控制策略.主要包括随机量库存率η(t)的定义及数学模型与表达其性质的定理,指出η(t)的分布规律为Weibull分布的概率密度函数,其变化的物理意义与库存实际情况相符;同时定义了任务、任务区段H(t),并以此作为约束条件得到控制库存率η(t)的策略:备件订购应在任务执行前越近越好,以控制η(t)分布尽快上升;任务执行时间区段越窄越好,以使η(t)值尽快下降.经实验应用,这些策略是有效的,它能为库存控制决策提供科学依据,使库存率降到最小范围.

On the basis of analysis of lots of inventory information,an inventory control strategy is presented based on Weibull distribution.It mainly includes the definition of inventory rate and mathematical model of η(t).The distribution of η(t) accords with the weibull distribution consistency,and its physical significance is in accord with actual inventory;meanwhile,the task and task section H(t) are defined.Using H(t) as restrictive condition,some strategies of control inventory rate η(t) are gained: spare part...