“…In the existing literature of operational performance evaluation, certain DEA models are variously applied by many researchers (Barros and Peypoch, 2009;Kuo et al, 2010;Huang et al, 2012;Chen et al, 2012;Pai, 2012;Goto et al, 2014;Tsui et al, 2014;Chen et al, 2015). As in the real-world problems, data involve ambiguity and vagueness; the conventional DEA models are not suitable for supporting the uncertain data.…”