摘要：The forces on the firms could be summarized in five dimensions namely, competition through new technologies, new entrants with their low cost of investments, suppliers with their high authority , buyers with their extreme freedom to switch to low cost supplier s , and high range of similar products on the market. Reducing price to compete with firms in the global market makes it compulsory to analyze the continually changing market demands and produce what customers r eally need and launch the product rapidly on the market to conquer the cheap products which ensures the company′s existence. Accordingly, more companies are getting conscious over the benefits of Front - End models of innovation comparing to traditional Back - process (Monczka et al. , 2000). Therefore, it is necessary to take a closer look at the whole potential aspect of improvement in firm's managerial process, especially at the fuzzy front end period by new product development to achieve higher success. One of the important aspects during this period of development is the involvement of external resources such as supplier and customer. Involving suppliers in product development has been namely explored to reduce costs of product and development, to decrease d evelopment time, and to improve product quality (Wasti & Liker, 1997) . In this paper, we will discuss the success factors and barriers of involvement of external resources and the be managed.
