This paper studies the co-design paradigm which refers to the concurrent design of products, their associated services, internal processes and networks of partners. The co-design is a powerful strategic positioning technique that will give opportunities to firms to reach and maintain a profitable position on the market. This means that future co-working needs should be taken into account from the beginning of the product life cycle. In this paper, we define some of the basic co-design concepts and also provide a set of indicators that allow the qualification of the collaboration of partners. These indicators are illustrated on a car assembly example.