The transition of manufacturing companies towards Product Service System (PSS) offers was mainly treated in the literature at the strategic level. This paper aims at studying the impact of the transition in operation management, with a specific focus on capacity management. With this purpose we present below a PSS Production System, used as a decision support tool. We first explain conceptually the modelling approach used, and the general concepts. Then we explain how discrete events simulation was applied to study different scenarios and strategy of capacity management on a case study. First results of this feasibility study are discussed.