Use of simulation technique is becoming more popular in managing design process. However, developing a simulation model can be very tedious and knowledge demanding, and a simulation model developed for one project cannot readily be used for others due to the unique nature of design project. This paper develops a generalized simulation model for the design process which is capable of generating simulation network automatically for any design project based on dependency relationships as represented by DSM. Concept of estimability and rework of design activities has been utilized in reducing the overall design completion time. Simulation can be run for the generated network to get a probabilistic design schedule. The proposed concept of autogeneration of simulation network has been studied with a case study. It is very efficient in generating the simulation network for any design process and saves the tedious job of simulation model development.