This paper explores the factors affecting project competence within firms producing complex products and systems (CoPS). We developed a research framework for the analysis of factors affecting the project competence in CoPS. Literature review and Nominal Group Technique were used to identify these factors and to assist in developing a questionnaire to identify and rank their associated measured variables, five key factors were identified and extracted by using factor analysis, and these resulting factors were related to the overall project competence in CoPS by using a multiple regression anal...