Abstract:In order to respond to the uncertain and dynamic business environment, manufacturing companies should integrate distributed resources in the supply chain and encourage customers and suppliers to involve in the innovation process.Customer and supplier involvement will help manufacturing companies obtain more resources and capabilities.In this study, we investigate the impact of customer and supplier involvement on new product success using multi-case study.The results indicate that customer can increase the probability of new product success.However, supplier involvement does not have significant impact on new product success.In addition, newness of product, time-to-market of new product, timing of customer and supplier involvement, and committed resources to customer and supplier involvement of manufacturing companies all have impact on new product success.