Decentralized supply chain formation using max-sum loopy belief propagation
Winsper, Michael and Chli, Maria (2012). Decentralized supply chain formation using max-sum loopy belief propagation. Computational intelligence, Early view ,
|PDF (Decentralized supply chain formation using max-sum loopy belief propagation) - Draft Version|
Official URL: http://onlinelibrary.wiley.com/doi/10.1111/j.1467-...
Supply chain formation is the process by which a set of producers within a network determine the subset of these producers able to form a chain to supply goods to one or more consumers at the lowest cost. This problem has been tackled in a number of ways, including auctions, negotiations, and argumentation-based approaches. In this paper we show how this problem can be cast as an optimization of a pairwise cost function. Optimizing this class of energy functions is NP-hard but efficient approximations to the global minimum can be obtained using loopy belief propagation (LBP). Here we detail a max-sum LBP-based approach to the supply chain formation problem, involving decentralized message-passing between supply chain participants. Our approach is evaluated against a well-known decentralized double-auction method and an optimal centralized technique, showing several improvements on the auction method: it obtains better solutions for most network instances which allow for competitive equilibrium (Competitive equilibrium in Walsh and Wellman is a set of producer costs which permits a Pareto optimal state in which agents in the allocation receive non-negative surplus and agents not in the allocation would acquire non-positive surplus by participating in the supply chain) while also optimally solving problems where no competitive equilibrium exists, for which the double-auction method frequently produces inefficient solutions.
|Additional Information:||Winsper, M. , & Chli, M. (2012). Decentralized supply chain formation using max-sum loopy belief propagation. Computational intelligence, Early view, which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1111/j.1467-8640.2012.00446.x/abstract|
|Uncontrolled Keywords:||loopy belief propagation, supply chain formation, max-sum algorithm|
|Divisions:||Schools_of_Study > Engineering & Applied Science > Computer Science (EAS)|
|Deposited By:||Prof Alfred Admin|
|Deposited On:||10 Dec 2012 15:24|
|Last Modified:||08 Jan 2013 17:57|
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