"This Security Manpower Planning Model (SMPM) has been developed by the Federal Transit Administration [FTA], with initial draft versions reviewed by the Transportation Security Administration (TSA) and American Public Transportation Association (APTA). The SMPM supports and closely aligns with FTA and TSA transit security fundamentals (including random and unpredictable roving patrols/inspections) and transit security program priorities (such as targeted training for transit security personnel). The Security Manpower Planning Model is a flexible decision support tool created to enable transit security planners the ability to assess impacts of strategic decisions on resources and staffing. Based on the data inputted, the model identifies staffing levels and budgeting. The SMPM is flexible in the sense that it can be used by any transit agency with existing or planned security resources, regardless of operating mode(s) or size. "
Surface Transportation Information Sharing and Analysis Center: http://www.surfacetransportationisac.org/reference.asp