Institute of Transportation, MOTC

        Due to marketing competition, the aviation industry was likely lead to losses by environment factors, such as politic, economic and oil price.
        Taiwanese airlines tried to take an advantage of duty-free sales to increase profits. The purpose of this study applied fuzzy Delphi technique, FDT and analytic hierarchy process, AHP to analyze assessment model of duty-free goods for sale in Taiwanese airlines. The results find that experts from different fields have individual preferred indicators. However, the empirical study indicates that service quality is the most important criterion considered in overall experts. The analysis of this investigation suggests that the Taiwanese airlines must evaluate service quality first.