Development Of A Hybrid Metric For Physical Security Assessment

In industrial practice, physical security assessments are increasingly performed using scoring methods. However, since scoring methods involve uncertainty, users face challenges in evaluating investment alternatives. While quantitative metrics have the advantage over scorings in that precise calculations can be made, their application is not as simple and intuitive as simple scorings. From a user's perspective, the key question is how to merge the strengths of both metrics to facilitate risk assessment without compromising accuracy. The goal of this paper is to formulate requirements for a hybrid metric for assessing physical vulnerability and to demonstrate the applicability of the outlined solution approach using a specific use case. In a first step, the problems of scoring are explained using the Harnser metric as an example. In a second step, the quantitative metric used to measure the quality of scoring is defined. The third step explains how the scoring under consideration can be extended and modified to replicate the quantitatively calculated results for all calculation results. In a final step, the proposed adjustment approach is demonstrated. Finally, the results are summarized and starting points for further research are identified.

Keywords: Physical security, Uncertainty, Metrics, Risk adjustment, Decision-making, Hybrid metric.