United States Department of Transportation
i
Optimal condition sampling for a network of infrastructure facilities.
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2011-12-31
[PDF-415.37 KB]
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Edition:Final report; Dec. 31, 2011.
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Abstract:In response to the developments in inspection technologies, infrastructure decision-making methods evolved whereby the optimum combination of inspection decisions on the one hand and maintenance and rehabilitation decisions on the other are determined based on an economic evaluation that captures the long term costs and benefits. Recently, sample size has been included in inspection, maintenance, and rehabilitation (IM&R) decision-making as a decision variable when considering a single facility. While, the question of dealing with a network of facilities in making IM&R decisions has been addressed in the literature, this treatment does not consider condition sampling whereby each facility could require a different set of sample sizes over time. This report presents an overview of the methodology developed to address the network level problem whereby the uncertainty due to condition sampling is captured and its related decision variables included in the IM&R decision making process. An example application is described and results and insights are presented. The parameters of the example of interest are determined by drawing upon various cases reported in the literature to arrive at a realistic base scenario for analysis. A comprehensive sensitivity analysis is also conducted to explore the effect of various factors on the optimal solution.
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