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    Fuzzy Real Option Value Integrated Fuzzy ANP Method for Location Selection Problems
    (IEEE, 2010) Tolga, A. Cagri; Tuysuz, Fatih; Kahraman, Cengiz
    Location selection decisions are irreversible for any type of enterprise. Making the right choice is vital. In this work, at the beginning, criteria for location selection in retail sector are determined. Then because of the dependency among criteria we choose ANP method as multi-criteria decision aid. The data are ambiguous and the nature of the problem is dynamic, hence fuzzy ANP is preferred. As the measurement technique of the financial criterion, we used the fuzzy real option value that calculates the risky side of the problem. Fuzzy trinomial lattice method without any future competitor is offered as the solution procedure for fuzzy real option value through its impact on efficiency and accuracy.
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    Service Location Selection after Natural Disasters Using a Possibilistic Approach
    (Atlantis Press, 2011) Tuysuz, Fatih; Tolga, A. Cagri
    Planning service facility locations before sudden happening of any disaster is vital for public organizations. Selection decision for cookhouse or infirmaries is very important because of agitated situation of disaster times. In this paper, through the resemblance of selection decision for service facility locations to retailing sector, a gravity based model is offered. Attractiveness of service location and distance between demand points and the service facility are key factors in location selection of service facilities. Due to the lack of data and imprecision of estimated parameters which cause uncertainty, fuzzy logic is utilized. Instead of probabilistic value, possibilistic values as a result of using fuzzy parameters are obtained in the proposed gravity model.