For program managers of mission-critical systems, the goal of interoperability through a common, shared infrastructure has become one of paramount importance for mission-critical systems. This should come as no surprise. Interoperability and shared architectures deliver real business benefits across industries. But achieving interoperability is not just a technical challenge; it also requires a new way of thinking about licensing and pricing policies for key system software. This whitepaper explores the business challenges of achieving interoperability and proposes a new Infrastructure Community model that facilitates the development, deployment, and maintenance of fully interoperable systems.