Abstract:Existed study of resource investment decision in cooperated new product development often ignore the importance and uniqueness of knowledge resources, especially ignore the bidirectional and multiple knowledge transfer process between enterprises, as well as the impact of this process on dynamics of knowledge resource investment. This paper took the cooperative research and development of two enterprises in supply chain as an example, built a process model of cooperated new product development based on knowledge development and knowledge transfer process. On the basis of considering the lag in knowledge growth, optimal resource investment decisions were discussed under different factors such as initial knowledge level, hysteresis effect and so on, and corresponding trends were showed with numerical experiments. We show that the optimal resources investment decision dynamically changed during the R&D cycle under the bidirectional and multiple knowledge transfer process, the initial knowledge level of both sides significantly affects the trend of optimal decision in knowledge transfer. As such, we show that the maximum value of optimal decision in knowledge development always appears in the beginning moment, which, however, will range under different circumstances in knowledge transfer