Companies face new coordination challenges for product development projects in terms of technical and technological issues and internal or external resources. Projects managers have to deliver successful products on time and to budget and need to minimize industrial risks, while building up long term links across their supply chains. This paper describes briefly the Co-Evolution of Products and Network of PartnerS (CEPS) and insists on dependency the main concept behind it. CEPS is a framework that considers simultaneously the product development process and the design/deployment of associated network of partners. The CEPS tools look for understanding and identifying mutual dependencies between these two fields. This will provide management drivers for designers and managers.