Abstract
Current approaches to infrastructure investment either (1) model the problem in high-level financial terms, but do not accurately express the underlying system behavior and non-financial performance indicators, or (2) are hard-wired to infrastructure silos, and do not take into account the complex interaction across these silos. This paper proposes to bridge the gap by modeling interrelated infrastructures as a hierarchical service network operating over a time horizon, as well as an extensible repository of infrastructure-specific component models. The paper reports on formal modeling, the development and an initial experimental study of InfraSmart, a decision guidance system for investment in interdependent infrastructure service networks.