关键词: 活动重叠, 知识欧姆定律, 知识势函数, 知识流函数, 知识返工概率函数

Abstract: For problems that time overlapping existed between upstream and downstream activities and overlapping time in the concurrent product development was difficult to be quantized,knowledge potential and knowledge resistance of upstream and downstream activities were quantized through functions from the knowledge perspective.Knowledge potential function and knowledge resistance function were respectively established based on knowledge difficulty coefficient and learning curve theory.Thus the knowledge flow function could be obtained by knowledge Ohm's Law combined above.The knowledge rework time in overlapping period was calculated based on knowledge rework probability function and  the mathematical model of overlapping time between upstream and downstream activities was established consequently.The feasibility and effectiveness of the proposed method were demonstrated by a case study.

Key words: activities overlapping, knowledge Ohm's Law, knowledge potential function, knowledge flow function, knowledge rework probability function