Trade-off between robustness and cost for a storage loading problem: rule-based scenario generation
Christina Büsing (),
Sigrid Knust () and
Xuan Thanh Le ()
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Christina Büsing: RWTH Aachen University
Sigrid Knust: University of Osnabrück
Xuan Thanh Le: Vietnam Academy of Science and Technology
EURO Journal on Computational Optimization, 2018, vol. 6, issue 4, No 2, 339-365
Abstract Integrating uncertainties into the optimization process is crucial to obtain solutions suitable for practical needs. In particular, the considered uncertainty set has a huge impact on the quality of the computed solutions. In this paper, we consider a storage loading problem in which a set of items must be loaded into a partly filled storage area, regarding stacking constraints and taking into account stochastic data of items arriving later. We propose a robust optimization approach dealing with the stochastic uncertainty. With a focus on constructing the uncertainty set, we offer a rule-based scenario generation approach to derive such a set from the stochastic data. To evaluate the robustness of stacking solutions, we introduce the concept of a security level, which is the probability that a stacking solution is feasible when the data of the uncertain items are realized. Computational results for randomly generated problem instances are presented showing the impact of various factors on the trade-off between robustness and cost of the stacking solutions.
Keywords: Robust optimization; Stochastic uncertainty; Interval uncertainty; Storage loading; Stacking constraints; 90B06; 90C31 (search for similar items in EconPapers)
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