In this study, an analysis was performed to examine relationship among such preceding conditions for new product development as entrepreneurship orientation, new product development factors and new product performance on the basis of empirical studies on new product development by medium-sized manufacturing companies. The outcomes of the analysis could be summed up as follows: First, the analysis found that the entrepreneurship orientation is exerting influence upon the factors of new product development, implying that the pursuit of entrepreneurship orientation might exercise impact on the factors of new product development. The intensification of entrepreneurship may thus be regarded as extremely important in promoting entrepreneurship orientation in order for enterprises to upgrade the executing level of new product development factors. Second, it was revealed from the analysis that the new product development factors have influence upon product innovation performance as new product performance, which implies that the executing level of new product development factors may be differentiated from that of competitors and highly innovative products can thus be offered to clients. Third, in the analysis, new product development factors are found to have effects upon product development performance. This suggests that systematic management of new product development factors is an important element in performing new product development effectively and determining the way of new product development performance.