options should guide decision making. Such a process would help DTRA and other agencies to design appropriate protection systems that optimize protection within the physical limitations of the building, technological limitations of the components (such as HVAC, filters, and sensors), and financial constraints. Developing the process that takes into account all the input for design to optimize output will incur additional costs up front, but the committee believes that the utility and ultimate cost savings of the approach will well justify this initial cost increase. To sustain the performance of a deployed building protection system or the framework to support its deployment, deployed building protection systems and their corresponding deployment processes should be reviewed periodically to assess whether they align with changing building conditions, building design methods, sensor and protection technologies, and threat types.

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