The growing importance of knowledge in product development processes is followed by the urgent need to manage the quality of implemented knowledge management strategies in the process. All sorts of companies have been implementing knowledge management activities in their daily routines, either or not they are aware of it. This paper introduces a model to measure the maturity level of knowledge intensive business processes, which is adjusted to the needs of small and medium enterprises (SME). A set of success factors and their indicators were developed to help identifying the as-is process situation and plan improvement measures as well as a web-based self-assessment tool.