Novel Spherical Fuzzy MARCOS Method for Assessment of Drone-Based City Logistics Concepts

Table 1

Linguistic terms and corresponding spherical fuzzy values.

Spherical fuzzy value	Abbreviation	Linguistic term
(0, 1, 0)	EP	Extremely poor
(0.1, 0.9, 0.1)	VP	Very poor
(0.2, 0.8, 0.2)	P	Poor
(0.3, 0.7, 0.3)	MP	Medium poor
(0.4, 0.6, 0.4)	M	Medium
(0.5, 0.5, 0.5)	MG	Medium good
(0.6, 0.4, 0.4)	G	Good
(0.7, 0.3, 0.3)	VG	Very good
(0.8, 0.2, 0.2)	EG	Extremely good
(0.9, 0.1, 0.1)	EX	Excellent