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Systems resilience for multihazard environments: definition, metrics, and valuation for decision making
1Center for Technology and Systems Management, Department of Civil and Environmental Engineering, University of Maryland, College Park, MD, USA.
Summary
Natural disasters cause billions in damages and fatalities. This study defines resilience and provides metrics for better risk management and decision-making in disaster recovery.
Area of Science:
- Disaster Risk Reduction
- System Resilience
- Decision Analysis
Background:
- Natural disasters in 2011 caused substantial global damages and fatalities, with storms, floods, and earthquakes being major contributors.
- Annual losses in the United States alone reach approximately $55 billion, highlighting the economic impact of disasters.
- Effective disaster risk reduction and recovery strategies necessitate a clear definition of resilience and associated metrics.
Purpose of the Study:
- To provide a robust definition of resilience that aligns with reliability and risk metrics.
- To establish logically consistent metrics for resilience based on measure theory.
- To develop effective decision-making tools for managing multihazard environments and improving system resiliency.
Main Methods:
- Defining resilience with clear relationships to reliability and risk metrics.
- Applying measure theory to ensure logical consistency of resilience metrics.
- Developing a decision-making framework for examining system enhancement alternatives in economic terms.
- Utilizing valuation and benefit-cost analysis methods based on risk analysis and management concepts.
Main Results:
- A definition of resilience is proposed that meets specific requirements and links to reliability and risk metrics.
- Metrics for resilience are established that are consistent with measure theory.
- A foundation is laid for developing decision-making tools for multihazard environments.
- Methods for societal valuation and benefit-cost analysis of resilience improvements are provided.
Conclusions:
- A clear definition and consistent metrics for resilience are crucial for rational disaster risk management.
- The proposed framework supports the development of effective decision-making tools for enhancing system resilience.
- Economic evaluation through valuation and benefit-cost analysis is essential for improving resilience and achieving risk reduction.
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