Enterprises are facing a new challenge with sustainable development. This adds more requirements to be dealt with in order to keep their competitiveness and sustain their position in the market. For the mass customization enterprises, sustainability performance may depend on several mass customization enablers, thus these two concepts need to be assessed together in order to foster both of them. To address such issues enterprise relationships with its environment need to be formalized before focusing on enterprise internal relationships. In this paper, enterprise interactions with environment, society and economical ecosystem are depicted as a first step to establish an enterprise model allowing the analysis of enterprise sustainability performance while implementing mass customization.