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为分析产品开发过程中的迭代对研发项目时间和成本的影响,本文首先研究了返工变更的传播过程,在直接返工概率和间接返工概率的基础上建立了返工因子设计结构矩阵(DSM),分析了返工变更传播和返工时间、范围对返工风险的影响.然后,提出采用返工预处理的方法降低返工影响强度,构建了预处理后的返工影响强度计算模型.进一步,基于返工预处理和返工因子DSM构建了项目净收益模型,并以项目净收益最大化作为流程DSM优化目标.最后,通过案例验证了本文提出的模型,优化与仿真结果表明采用本文提出的方法可有效控制返工风险.
In order to analyze the influence of iteration on R & D project time and cost in the process of product development, this dissertation firstly studies the propagation process of rework change, and establishes the rework factor design matrix (DSM) based on the direct rework probability and indirect rework probability. The influence of rework propagation and rework time and scope on the risk of rework was proposed.Then, the method of rework was used to reduce the impact of rework, and the rework calculation model was built.Furthermore, based on rework preprocessing and rework factor DSM builds a net return model of the project, and maximizes the net proceeds of the project as the objective of the process DSM optimization.Finally, the model proposed in this paper is validated through a case study. The optimization and simulation results show that the proposed method can effectively control the rework risk.