Design of a physical security perimeter fencing system requires that security designers provide effective detection, delay, and response functionalities with minimal nuisance alarms. In addition, the designers must take into considerations the security fence system life cycle cost (equipment and grounds maintenance), complexity of the terrain, safety, and environmental conditions (location of where the security fence will be installed). Often, these factors drive the security designers to design a perimeter intrusion detection and assessment system (PIDAS) that includes: 1) larger than desired footprint, 2) one or more animal control fences to minimize the nuisance alarm rate (NAR), and 3) clear zones and an isolation zone to facilitate intrusion detection and assessment by keeping the fence lines clear of vegetation, trash, and other objects that could impede the security system's performance. This paper presents a two-tier PIDAS design that focuses on effective performance specifically in high probability of detection and low NAR that minimizes cost and the footprint of the system.
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