Resilience Quantification and Its Support for Operational Resilience

We present a method to quantify a system’s resilience capacity, i.e., the set of degradation magnitudes for which all functional requirements remain satisfied. These requirements come from human stakeholders (e.g., operators, planners) who define the acceptable performance envelope. By representing the resilience capacity in degradation space, we obtain an application-agnostic resilience metric (e.g., capacity volume). To approximate the capacity efficiently in high-dimensional spaces, we pair machine-learning classifiers with entropy-based active sampling, reducing costly feasibility tests. The learned model then drives diagnosis (current health estimation) and prognostics (health-state forecasting) that estimates useful life. These two steps can be complemented by a reconfiguration step implemented by human operators to prolong the system’s functionality. An illustrative case study, i.e., a manufacturing production line meeting weekly human set part demand, demonstrates the proposed workflow.