A simple yet robust resilience assessment metrics

The concept of resilience has its roots in a multitude of disciplines, from ecology to social sciences, psychology, and economics. Despite the rich history of the resilience concept, engineering resilience is still in its infancy. There is a growing interest to understand better and improve the resilience performance of engineering systems. This demands more reliable and widely accepted methods of measuring, assessing, and monitoring resilience. In the past decade, few definitions and frameworks for resilience quantification were proposed. However, most of these methods serve a specific application. This paper takes a fresh look at definitions of resilience and its measurement. It offers a new set of metrics based on the concept of reliability and maintainability combined with the system modeling approach. The proposed metrics are explained and tested implementing numeric simulations in addition to a case study.