A Mixed Integer Programming Model for Supplier Selection and Order Allocation Problem with Fuzzy Multiobjective

Table 16

Comparison of quality, delivery performance, and cost functions.

Service level
	Single	Weighted	Single	Weighted	Single	Weighted
Quality	31.79	30.87	31.74	30.44	31.30	29.59
VPA quality	(1.0298)	(1.0000)	(1.0427)	(1.0000)	(1.0578)	(1.0000)
Delivery performance	17.57	19.59	17.69	19.59	17.52	19.48
VPA delivery	(1.0000)	(1.1150)	(1.0000)	(1.1074)	(1.0000)	(1.1119)
Cost	2527.03	2530.45	2510.29	2509.89	2507.37	2484.07
VPA cost	(1.0000)	(1.0014)	(1.0002)	(1.0000)	(1.0094)	(1.0000)