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Computing nonstationary (s, S) inventory policies via genetic algorithm

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Author(s): Kannapha Amaruchkul | Surapong Auwatanamongkol

Journal: Songklanakarin Journal of Science and Technology
ISSN 0125-3395

Volume: 35;
Issue: 1;
Start page: 115;
Date: 2013;
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Keywords: stochastic model applications | genetic algorithm | nonstationary inventory management

ABSTRACT
A periodic-review inventory model with nonstationary stochastic demand under an (s, S) policy is considered.We apply a genetic algorithm to solve for reorder points and order-up-to levels which minimize an expected total cost.A closed-form exact expression for the expected cost is obtained from a nonstationary discrete-time Markov chain. In ournumerical experiments, our approach performs very well.
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