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\textbf{A Fuzzy Approach to Multi Objective Multi Echelon Supply Chain}
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B. Ahlatcioglu Ozkok$^{1}$, \textbf{S. Ercan}$^{2}$ and E. Budak$^{1}$

$^{1}$Department of Mathematics, Yildiz Technical University, Istanbul, Turkey
$^{2}$Department of Mathematics, Firat University, Elazig, Turkey
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\textbf{Abstract}

Recent times, companies are being forced by hard marketing conditions to make significant and strategic decisions on their supply chains. In this context, companies are trying to optimize supply chains towards customer demands and trying to prevent costs that caused by number of inactive facilities. In this study, by using AHP we make decision about potential establishment of a number of potential warehouses and distributions centers at regions to be selected from a set of possible candidates with certain possibilities of customer demands in the supply chain network of  a company that is importing and exporting cleaning materials. The proposed model attempts to simultaneously minimize total cost and maximizing rating candidate locations using mixed integer linear programming. To obtain solution fuzzy decision making method is used  and numerical example is illustrated. 

\textbf{References}

[1] Tsiakis, P., Shah, N., Pantelides, C.C., Design of multi-echelon supply chain network under demand uncertainty, Ind. Eng. Chem. Res., 40, 3585-3604, 2001.

[2] Amid, A., Ghodsypour, S.H., O'Brien, C., Fuzzy multi objective linear model for supplier selection in a supply chain, Int. J. Production Economics, 104, 394-407, 2006.

[3] Zimmerman, H.J., Fuzzy Set Theory and its applications, Kluwer Academic Publishers, Boston/ Dordrecht/London, 1992.

[4] Kokangul, A., Susuz, Z., Integrated analytical hierarch process and mathematical programming to supplier selection problem with quantity discount, Applied Mathematical Modeling, 33, 1417-1429, 2009. \hrule

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