1 research outputs found
Infrastructure Resilience Curves: Performance Measures and Summary Metrics
Resilience curves are used to communicate quantitative and qualitative
aspects of system behavior and resilience to stakeholders of critical
infrastructure. Generally, these curves illustrate the evolution of system
performance before, during, and after a disruption. As simple as these curves
may appear, the literature contains underexplored nuance when defining
"performance" and comparing curves with summary metrics. Through a critical
review of 273 publications, this manuscript aims to define a common vocabulary
for practitioners and researchers that will improve the use of resilience
curves as a tool for assessing and designing resilient infrastructure. This
vocabulary includes a taxonomy of resilience curve performance measures as well
as a taxonomy of summary metrics. In addition, this review synthesizes a
framework for examining assumptions of resilience analysis that are often
implicit or unexamined in the practice and literature. From this vocabulary and
framework comes recommendations including broader adoption of productivity
measures; additional research on endogenous performance targets and thresholds;
deliberate consideration of curve milestones when defining summary metrics; and
cautionary fundamental flaws that may arise when condensing an ensemble of
resilience curves into an "expected" trajectory.Comment: 32 pages, 4 figures. Submitted to Reliability Engineering & System
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