Using easy-to-understand language, this volume explains how to evaluate the appropriateness of security countermeasures from a cost effectiveness perspective. It details the five core principles of the risk analysis lifecycle through numerous case illustrations. The book guides readers from basic principles to complex processes and explains why terrorism threats and traditional crimes each require their own unique risk assessment approaches. This complete resource includes an adaptable risk analysis tool that is simple to use, can be applied in public or private industries, and works with all DHS–approved methods.