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• W2043711897 abstract "To address effectively the urgent societal need for safe structures and infrastructure systems under limited resources, science-based management of assets is needed. The overall objective of this two part study is to highlight the advanced attributes, capabilities and use of stochastic control techniques, and especially Partially Observable Markov Decision Processes (POMDPs) that can address the conundrum of planning optimum inspection/monitoring and maintenance policies based on stochastic models and uncertain structural data in real time. Markov Decision Processes are in general controlled stochastic processes that move away from conventional optimization approaches in order to achieve minimum life-cycle costs and advice the decision-makers to take optimum sequential decisions based on the actual results of inspections or the non-destructive testings they perform. In this first part of the study we exclusively describe, out of the vast and multipurpose stochastic control field, methods that are fitting for structural management, starting from simpler to sophisticated techniques and modern solvers. We present Markov Decision Processes (MDPs), semi-MDP and POMDP methods in an overview framework, we have related each of these to the others, and we have described POMDP solutions in many forms, including both the problematic grid-based approximations that are routinely used in structural maintenance problems, and the advanced point-based solvers capable of solving large scale, realistic problems. Our approach in this paper is helpful for understanding shortcomings of the currently used methods, related complications, possible solutions and the significance different solvers have not only on the solution but also on the modeling choices of the problem. In the second part of the study we utilize almost all presented topics and notions in a very broad, infinite horizon, minimum life-cycle cost structural management example and we focus on point-based solvers implementation and comparison with simpler techniques, among others." @default.
• W2043711897 created "2016-06-24" @default.
• W2043711897 creator A5048615072 @default.
• W2043711897 creator A5085766592 @default.
• W2043711897 date "2014-10-01" @default.
• W2043711897 modified "2023-10-18" @default.
• W2043711897 title "Planning structural inspection and maintenance policies via dynamic programming and Markov processes. Part I: Theory" @default.
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• W2043711897 doi "https://doi.org/10.1016/j.ress.2014.04.005" @default.
• W2043711897 hasPublicationYear "2014" @default.
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