This paper deals with the impact of knowledge management in an organization on various types of projects, the organization performs. According to Peter Drucker knowledge is the only meaningful economic resource. There is no generally accepted definition of Knowledge Management; However the creation and diffusion of knowledge have become ever more important factors in competitiveness. This study examines the impact of the various components of knowledge management on the performance of projects performed in Israel. Success of technological ventures is measured in wide spectrum of variables. One category of measures is about the contribution of a venture to the developing organization in expanding the technological infrastructure of the organization, and increasing the level of knowhow and knowledge in the developing organization. Other not less important aspects of success are in terms of meeting economic goals and penetration to new or existing markets. The projects were grouped into three different groups, defined by the level of Novelty of the project's product, the level of Technology required to perform the project and the level of Complexity of the product it produces. The paper shows the impact of the various components of knowledge management on projects at large and on the different groups in particular and also shows that the impact of knowledge management on the success of projects varies according to the levels of Novelty, Technology and Complexity of the projects.