Abstract: To evaluate risks in product development and improve product development process, a logical iteration struc- ture based method for process simulation is proposed. A logical iteration structure net based process model is defined and it is used to extend design structure matrix based process model used in traditional simulation method. Effects of logical relationships among iterations are considered in new model so that errors caused by neglecting logical relationships can be avoided. Algorithm and inputs of process simulation system based on new model are given. Then logical iteration structure based process simulation system is developed and motocycle brake development process is applied as an example. New simulation method extend traditional process simulation model and reduce errors in traditional process simulation method. It can improve accuracy of analysis and estimation of product development process and improve efficiency of product development.

Key words: Design structure matrix, Process modeling, Process simulation, Product development process management