作　　者： ;

机构地区： 南开大学信息技术科学学院

出　　处： 《系统工程》 2002年第6期58-61,共4页

摘　　要： 讨论加工时间服从指数分布的单机随机调度问题 ,目标是实现工件完成时间与公共交货期偏差的加权和的期望最小化。此问题是 JIT(Just- In- Time)生产环境下的典型调度模型。结果表明问题的最优解关于权值与加工时间均值的商具有 Λ形特征。 In this paper, a single machine scheduling with exponentially distributed random processing times is considered, the objective is to find an optimal schedule to minimize the expected total weighted deviations of completion times from a common due date. This problem is a typical scheduling model in JIT(Just-In-Time) production environment. It is shown that the optimal schedules of the problem are Λ-shaped with respect to w iλ i(=w i/E(p i), i.e., the sequence of w iλ i has a single local maximum, where w i,p i and λ i denote the weight, processing time and processing time rate of job i,respectively.

关 键 词： 加工时间 指数分布 单机随机调度 形调度

领　　域： [理学] [理学]