A Parametric Method for Ranking Intuitionistic Fuzzy Numbers and Its Application to Solve Intuitionistic Fuzzy Network Data Envelopment Analysis Models

Table 2

Mathematical symbols utilized in the following formulas.

Mathematical symbols	Meanings
	An intuitionistic fuzzy number
	Membership function of
	Nonmembership function of
	Hesitation function of
	Maximum degree of the membership function
	Minimum degree of the nonmembership function
	α-cut set of
	-cut set of
	-cut set of
	The assigned function to for the selected decision level and hesitation degree
, , and	Bounded monotonic decreasing left continuous functions
, , and	Bounded monotonic increasing left continuous functions
	Intuitionistic fuzzy efficiency score of the decision-making unit under evaluation
	The i^th intuitionistic fuzzy input data of the j^th decision-making unit
	The r^th intuitionistic fuzzy output data of the j^th decision-making unit
	The d^th intuitionistic fuzzy intermediate data of the j^th decision-making unit
	The given weight to intuitionistic fuzzy input data i
	The given weight to intuitionistic fuzzy output data r
	The given weight to intuitionistic fuzzy intermediate data d