Essentially a new product development processis constituted with interactions of multiple value-chain activities such as marketing, research and development, manufacturing. Therefore for a successful NPD, it is required for a firm to execute those activities not only effectively, but also in a organic, coordinated manner. Moreover, a firm should be able to speed up its ramp-up production after new products and/or new processes developed by R&D were transferred to the manufacturing to be competitive in a recent turbulent market. In this study, we suggest a rather new concept, ‘fidelity between R&D and manufacturing in NPD’ to clarify relationships among abundant known success factors of NPD. And we tried to answer how to define this concept and what kinds of construct variables could be included through comprehensive literature survey. In addition to validate the fidelity concept, 5 cases were chosen in highly competitive, rapid innovating industries. From literature and case analysis results, we confirmed that the fidelity concept has 3 components, structural factor, infra-structural factor, and coordination factor. And a theoretical framework has been suggested to answer when which factors should be focused in terms of length of product life cycle and uncertainty of NPD.