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Impact of dampening demand variability in a production/inventory system with multiple retailers

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Date
2013
Author
Van Houdt B.
Pérez J.F.
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Citation
URI
https://doi.org/10.1007/978-1-4614-4909-6_11
https://repository.urosario.edu.co/handle/10336/28527

Abstract
We study a supply chain consisting of a single manufacturer and two retailers. The manufacturer produces goods on a make-to-order basis, while both retailers maintain an inventory and use a periodic replenishment rule. As opposed to the traditional (r, S) policy, where a retailer at the end of each period orders the demand seen during the previous period, we assume that the retailers dampen their demand variability by smoothing the order size. More specifically, the order placed at the end of a period is equal to ? times the demand seen during the last period plus (1 ? ?) times the previous order size, with ? ? (0, 1] the smoothing parameter. We develop a GI/M/1-type Markov chain with only two nonzero blocks A 0 and A d to analyze this supply chain. The dimension of these blocks prohibits us from computing its rate matrix R in order to obtain the steady state probabilities. Instead we rely on fast numerical methods that exploit the structure of the matrices A 0 and A d , i.e., the power method, the Gauss–Seidel iteration, and GMRES, to approximate the steady state probabilities. Finally, we provide various numerical examples that indicate that the smoothing parameters can be set in such a manner that all the involved parties benefit from smoothing. We consider both homogeneous and heterogeneous settings for the smoothing parameters.

Keyword

Structured markov chains ; Supply chain ; Inventory ; MSC: primary 60J22 ; Secondary 90B30 ; 90B05 ;

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https://link.springer.com/chapter/10.1007/978-1-4614-4909-6_11...

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