The arrival of the mobile telecommunications service industry and its rapid and widespread growth is the most\r\nsignificant developments in the fields of communication. The aim of this study is to propose a decision-making\r\nstructure to determine the appropriate Global System for Mobile Communications (GSM) operator. There are varieties\r\nof driving factors involved in choosing the most suitable GSM�s operator, and all these factors have positive and\r\nnegative interactions with each other; in this regard, we apply an appropriate multi-criteria decision- making method.\r\nDue to the interdependency between these criteria, we use Analytic Network Process (ANP) that generalizes Analytic\r\nHierarchical Process (AHP) by considering the interdependencies among factors. The results of this method illustrate\r\nthat customer satisfaction and word of Mouth are the most important factors in selecting GSM�s operators in Iran. The\r\nproposed structure provides valuable insight into the process of GSM�s operator selection for GSM managers and\r\npractitioners. It can be applied as a practical assessment tool providing an evaluation of GSM operator�s market share\r\nand identifies areas of weakness that negatively affect success in market share.
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