What is Probability of Detection

The security of infrastructure systems is increasingly associated and ties to ensuring a company's basic functional continuity. Increasing security and ultimately the resilience of infrastructure systems is significantly linked to the process of infrastructure security assessment. It is obvious that the basic pillar of ensuring the required level of security and resilience of infrastructure systems is the level of physical security. Therefore, the chapter will discuss the methods for physical security assessment with a link to the different nature of selected infrastructure systems. The basic logic will be the exploitation of qualitative-quantitative methods, assessing an existing or proposed security system, based on certain measurable values such as probability of detection, response force time, delay time and probability of correct and timely guard communication, where based on this data, the probability of interruption is estimated.