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Convex Approximations of a Probabilistic Bicriteria Model with Disruptions

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Author
Rengarajan, Tara
Dimitrov, Nedialko B.
Morton, David P.
Date
2011
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Abstract
We consider a multiperiod system operation problem with two con icting objectives, minimizing cost and risk. Risk stems from uncertain disruptions to the system during operation. While a general model would hedge against disruptions in each time period, we study special cases in which only a modest number of disruptions occur. To optimize for risk, we employ a convex approximation based on constraint sampling. We develop a strati ed sampling scheme based on distributional information on the time of disruption. We establish that our scheme yields signi cant savings in sampling costs|up to an order of magnitude in the number of time periods|over naive sampling. Moreover, in the absence of distributional information, we exhibit a sampling strategy that has comparable performance to optimal strati cation. We numerically demonstrate that strati cation improves cost over naive sampling, improving the solution's proximity to the e cient frontier of the bicriteria problem.
Description
INFORMS Journal on Computing, July 2011
 
 
The article of record as published may be located at http://dx.doi.org/ 10.1287/ijoc.1110.0483
 
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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http://hdl.handle.net/10945/37923
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