In Proceedings of the Twelfth Conference on Uncertainty in Artificial Intelligence ( UAI - 96 ) , Portland , OR , USA , August 1996 Optimal Factory Scheduling using Stochastic Dominance

资源类型: 资源大小: 文档分类: 上传者:张红侠

文档信息

【标题】In Proceedings of the Twelfth Conference on Uncertainty in Artificial Intelligence ( UAI - 96 ) , Portland , OR , USA , August 1996 Optimal Factory Scheduling using Stochastic Dominance

【作者】 Peter R. Wurman  Michael P. Wellman 

【关键词】Multiple Criteria Scheduling Problems Factory SDA Setup Time 

【摘要】We examine a standard factory scheduling problem with stochastic processing and setup times; minimizing the expectation of the weighted number of tardy jobs. Because the costs of operators in the schedule are stochastic and sequence dependent; standard dynamic programming algorithms such as A* may fail to nd the optimal schedule. The SDA* (Stochastic Dominance A*) algorithm remedies this diiculty by relaxing the pruning condition. We present an improved state-space search formulation for these problems and discuss the conditions under which stochastic scheduling problems can be solved optimally using SDA*. In empirical testing on randomly generated problems; we found that in 70%; the expected cost of the optimal stochastic solution is lower than that of the solution derived using a deterministic approximation ; with comparable search eeort.

问答

我要提问