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Investment Strategies under Uncertainty for Transportation Asset Management

机译:运输资产管理不确定性下的投资策略

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With the aging transportation network in the U.S. and stringent funds, there is a greater need for robust risk-based transportation asset management (TAM) approaches. To date, several studies have incorporated infrastructure performance uncertainty in infrastructure management. These studies focused on minimizing the uncertainty given a target level of performance at the network level. Observing the success of quantitative risk analysis (QRA) in investment strategies in the world of finance and economics, coupling risk and uncertainty with return to evaluate competing investment strategies can diversify the agency choices and allow for a wider range of strategies. This study presents a preliminary framework to use QRA for budget allocation within a pavement management system. An implementation is presented for a sample pavement network to quantify the impact of preservation activities and the risks associated to different budget allocation strategies. The analysis was conducted using @Risk, which performed Monte Carlo simulation to assess the uncertainty of the network performance. The analysis produced an empirical efficient frontier with Pareto optimal strategies in the risk-return space.
机译:随着美国和严格资金的老化运输网络,对基于风险的风险的运输资产管理(TAM)方法更加需要。迄今为止,若干研究已在基础设施管理中纳入基础设施性能不确定性。这些研究专注于最小化网络级别的目标性能水平的不确定性。观察金融和经济世界的投资策略中的量化风险分析(QRA)的成功,耦合风险和回报评估竞争投资策略可以使原子能机构的选择多样化,并允许更广泛的策略。本研究提出了在路面管理系统中使用QRA进行预算分配的初步框架。提出了一种用于样品路面网络,以量化保存活动的影响以及与不同预算分配策略相关的风险。使用@RISK进行分析,执行蒙特卡罗模拟以评估网络性能的不确定性。该分析在风险返回空间中产生了具有Pareto最佳策略的经验有效的边疆。

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