基于知识欧姆定律的产品开发耦合活动重叠时间研究

Research on Overlapping Time of Product Development Coupling Activities Based on Knowledge Ohm’s Law

针对产品开发过程中耦合活动重叠执行时间难于量化的问题,从知识欧姆定律的角度分析耦合活动重叠执行特性,建立了知识存量函数、知识阻函数及知识流强度函数.基于知识的难易程度和上游活动的可变度构建上、下游活动的知识返工时间函数,以全局收益最大化建立耦合活动重叠执行的时间模型.最后,结合实例运用Matlab仿真优化求出了使全局收益最大化的下游活动最佳介入时间,验证了该方法的有效性和可行性.

In order to solve the problem that the overlapping execution time of coupling activities is difficult to quantify in the product development process,the overlapping execution characteristics of coupled activities are analyzed from the perspective of knowledge Ohm's law.Knowledge inventory function,knowledge resistance function and knowledge flow intensity function are established.The knowledge rework time function of upstream and downstream activities is constructed based on the difficulty of knowledge and the variability of upstream activities,and the time model of overlapping execution of coupled activities is established to maximize the global benefits.Finally,using Matlab to find the optimal intervention time for the downstream activities to maximize the global benefit;the validity and feasibility of the method are verified.