Abstract: This paper presents the information aggregation methods enabling cost- and QoS-aware service deployment. It is expected that network management tools will require the network itself to participate in the service deployment task so as to adapt to heterogeneous networknodes cost, QoS, and capabilities. The aggregation methods are part of a set of hierarchically-distributed computations, for which a formal description is presented. Four types of information that can be handled by the mechanism are introduced and illustrated by examples from three service-deployment categories.