A fuzzy coherent hierarchical location-allocation model for congested systems. Shavandi, H., Mahlooji, H., Eshghi, K., & Khanmohammadi, S. Scientia Iranica, 13(1):14--24, 2006.
A fuzzy coherent hierarchical location-allocation model for congested systems [pdf]Paper  abstract   bibtex   
A fuzzy queuing coherent hierarchical location-allocation model is developed for congested systems. The parameters of the model are approximately evaluated and stated as fuzzy-numbers. The coverage of demand nodes is also considered in an approximate manner and is stated by the degree of membership. Using the queuing theory and fuzzy conditions, a coherent hierarchical model is developed for the Maximal Covering Location Problem (MCLP). An example problem is solved and presented, along with results. Conclusions and future extensions are also included. © Sharif University of Technology, January 2006.

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