Impact Factors (Consequence or Loss by a Major Security Event)

Primary

1. National Symbolism or National Prominence
   Buildings of great national pride and/or prominence are higher risk. For example, the New York Stock Exchange ranks very high.

2. National Political Significance
   Key political buildings, such as the U.S. Capitol or The White House, rank high.

3. Local Economic Significance
   A large local employer or major financial institution ranks high.

4. Infrastructure or Transportation Utility
   A transportation hub ranks high.

Secondary

1. Presence of a Child Care Facility
   A childcare facility in a building increases this risk factor.

2. Building Occupancy
   This factor is much greater when building occupancy is high.

3. Building Size/Gross Square Footage
   This factor increases as the size of the building increases.

4. Public Visitors
   A building with many public visitors is at greater risk than a location with less human traffic.

5. Historic Designation
   This factor measures the difficulty of replacing a building with a historic designation.

6. Overall Impact
   This factor reflects the magnitude of loss to tenants and building owners when a building can no longer be occupied after a terrorist attack.