Distribution systems design with two-level routing considerations |
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Authors: | Jenn-Rong Lin Hsien-Chung Lei |
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Institution: | (3) Dept. Industrial and Systems Engin. Univ. Florida, 303 Weil Hall, Gainesville, Florida 32611, USA;(4) Dept. Industrial Engin. Seoul National Univ. Technol., Kongnung Dong, Nowon Gu, Seoul, Korea |
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Abstract: | In this study, we formulate and analyze a strategic design model for three-echelon distribution systems with two-level routing
considerations. The key design decisions considered are: the number and locations of distribution centers (DC’s), which big
clients (clients with larger demand) should be included in the first level routing (the routing between plants and DC’s),
the first-level routing between plants, DC’s and big clients, and the second-level routing between DC’s and other clients
not included in the first-level routing. A hybrid genetic algorithm embedded with a routing heuristic is developed to efficiently
find near-optimal solutions. The quality of the solution to a series of small test problems is evaluated—by comparison with
the optimal solution solved using LINGO 9.0. In test problems for which exact solutions are available, the heuristic solution
is within 1% of optimal. At last, the model is applied to design a national finished goods distribution system for a Taiwan
label-stock manufacturer. Through the case study, we find that the inclusion of big clients in the first-level routing in
the analysis leads to a better network design in terms of total logistic costs. |
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