Economic tools are needed to help the owners and managers of buildings, industrial facilities, and other critical infrastructure to select cost-effective combinations of mitigation strategies that respond to natural and man-made hazards. Economic tools include evaluation methods, standards that support and guide the application of those methods, and software for implementing the evaluation methods. This document focuses on Version 4.0 of the Cost-Effectiveness Tool (CET 4.0); it describes: the input data requirements for the software, the hierarchy of software screens, the evaluation methods...