In order to stay competitive and meet the changing needs of the market, construction firms must develop efficient means of gathering and using knowledge of end-users requirements. This study uses two case studies, to explore the knowledge creation of end-users requirements in project driven firms. The focus of the study is the interface between firm and project. The interface is analyzed from both an autopoietic and cognitive, organizational and societal view. The findings implicates the importance of understanding (a) what kinds of knowledge that is dominated in the different organizations (b) what could be expected in the exchange of data, (c) what action needs to be taken in order to create value of it. The study suggests that considering the organization as an autopoietic system could be useful to understand the organizations responses to a dynamic environment. © 2010 by the Project Management Institute.