并行工程产品开发过程定量化建模与计划制订

Quantitative modeling and planning of the product development process in concurrent engineering

由于现有的一些并行工程定量化模型中修改设计微循环的细节特征描述得还不够充分 ,本文提出了一种新的基于产品 -工艺设计活动对网络的定量化模型来描述并行工程产品开发过程 ,并且给出了产品 -工艺设计活动对平均持续时间与产品或工艺设计活动资源占用率的计算方法 .在此基础上 ,将并行工程产品开发过程的计划制订问题建模成一个有资源约束的项目调度问题 .与其它此类问题不同的是 ,在本文中 ,分配给产品开发项目的各类资源的数量不是事先给定的 ,而是与最优产品开发计划一起获得的 ,所以这是一个资源分配与计划制订的集成优化问题 .

Since in some proposed quantitative models the detail feature of the mini circulation of design revision in product development process has not been described sufficiently, a new type of quantitative model based on the network of product process design activity pairs is proposed in this paper to describe the product development process in concurrent engineering. And the method of computing the mean duration of the product process design activity pair and the resource occupation rate of product or process design activity is proposed. Based on that, the problem of the planning of the product development process in concurrent engineering is modeled as a resource constrained project scheduling problem. Different from other resource constrained project scheduling problems, in this paper, the number of the resources allocated for the product development project is not pre determined, but is obtained along with the optimal product development plan. Therefore, this is an integrated optimization problem of the resource allocation and the planning of the product development process. A new algorithm based on branch and bound approach is proposed in this paper for solving the problem and a heuristic rule is introduced to improve the searching efficiency of the algorithm.