Customer-Oriented Vehicle Routing Problem with Environment Consideration: Two-Phase Optimization Approach and Heuristic Solution

Table 2

Membership function of evaluation linguistic variables.

Language terminology	Triangular fuzzy number	Judgment scale
largest	(0.75,1,1)	1
large	(0.5,0.75,1)	0.75
medium	(0.25,0.5,0.75)	0.5
small	(0,0.25,0.5)	0.25
smallest	(0,0,0.25)	0