Table 3 Linguistic terms and corresponding CPFSs.

Excellent performance

EP

(\(0.92 \textrm{e}^{\iota \frac{5\pi }{3}}\), \(0.03 \textrm{e}^{\iota \frac{\pi }{20}}\), \(0.05 \textrm{e}^{\iota \frac{\pi }{10}}\))

Very good performance

VGP

(\(0.83 \textrm{e}^{\iota \frac{8\pi }{5}}\), \(0.06 \textrm{e}^{\iota \frac{\pi }{12}}\), \(0.09 \textrm{e}^{\iota \frac{\pi }{6}}\))

Good performance

GP

(\(0.74 \textrm{e}^{\iota \frac{3\pi }{2}}\), \(0.09 \textrm{e}^{\iota \frac{\pi }{7}}\), \(0.14 \textrm{e}^{\iota \frac{\pi }{4}}\))

Fair performance

FP

(\(0.64 \textrm{e}^{\iota \frac{4\pi }{3}}\), \(0.13 \textrm{e}^{\iota \frac{\pi }{8}}\), \(0.19 \textrm{e}^{\iota \frac{\pi }{3}}\))

Marginal performance

MP

(\(0.53 \textrm{e}^{\iota \frac{7\pi }{6}}\), \(0.16 \textrm{e}^{\iota \frac{\pi }{6}}\), \(0.23 \textrm{e}^{\iota \frac{4\pi }{9}}\))

Poor performance

PP

(\(0.42 \textrm{e}^{\iota \pi }\), \(0.19 \textrm{e}^{\iota \frac{\pi }{3}}\), \(0.31 \textrm{e}^{\iota \frac{\pi }{2}}\))

Very poor performance

VPP

(\(0.31 \textrm{e}^{\iota \frac{5\pi }{6}}\), \(0.24 \textrm{e}^{\iota \frac{\pi }{5}}\), \(0.37 \textrm{e}^{\iota \frac{5\pi }{8}}\))