Modeling and analyzing of overlapping coupling tasks based on design structure matrix

To optimize product development process,overlapping was introduced into the research of coupling tasks.The method to determine the upstream-downstream relationship of objective tasks was developed based on Gaussian elimination solution.According to the model of information modification rate,the mathematical model of product development time was constructed.During this process,the time delay from rework and concurrent communication in overlapping process was taken into account.At the same time,Gaussian elimination solution and iteration characteristics of coupling tasks were applied in the model.Finally,the model was verified by an engineering example.And characteristics of some parameters were analyzed.