“…Besides its use as a measurement tool for sustainability, fuzzy logic (Zadeh, 1965) is extensively applied as an analysis methodology in such areas as company organisation and financial economics (Shapiro, 2004;Cassia et al, 2005;Sheen, 2005;Tiryaki and Ahlatcioglu, 2005;Bottani and Rizzi, 2006;Gunasekaran et al, 2006;Cheng et al, 2007;Lin et al, 2007;Perez Gladish et al, 2007;Wu and Lee, 2007;, a fact that emphasizes the relevance of mathematics of uncertainty in environments submitted to profound business changes (Gil-Aluja 1996).…”