| Evaluation methods | References | Frequency |
| Fuzzy sets (TFNs) | [17, 25, 26, 28, 30, 34, 36, 37, 42, 43, 50, 59, 67, 69, 81, 89, 100, 117, 123–125, 137, 142, 152, 158, 161, 162, 164, 165, 168, 171, 172, 177–181, 187, 188, 190, 192, 193, 196, 209] | 44 | Fuzzy sets (TrFNs) | [63, 106, 110, 112, 140, 148, 173, 183, 184, 195] | 10 | Interval type-2 fuzzy sets | [19, 22, 48, 64, 84, 115, 116, 131, 143, 149] | 10 | Intuitionistic fuzzy sets | [18, 23, 24, 33, 60, 121, 134, 155, 157] | 9 | Heterogeneous information | [46, 54, 73, 80, 122, 144] | 6 | Hesitant fuzzy sets | [35, 76, 77, 132, 150] | 5 | Interval-valued fuzzy sets | [49, 126–128] | 4 | Grey numbers | [38, 39, 41, 114] | 4 | Interval-valued intuitionistic uncertain linguistic sets | [149, 156, 193] | 3 | Interval-valued intuitionistic fuzzy sets | [146, 151, 166] | 3 | Neutrosophic sets | [21, 52] | 2 | Rough sets | [68, 197] | 2 | Cloud model theory | [79, 138] | 2 | Interval-valued Pythagorean fuzzy sets | [27, 108] | 2 | Picture fuzzy sets | [56, 61] | 2 | Interval-valued intuitionistic trapezoidal fuzzy sets | [57] | 1 | Interval type-2 trapezoidal fuzzy sets | [47] | 1 | 2-Tuple linguistic variables | [153] | 1 | Interval 2-tuple linguistic variables | [147] | 1 | Hesitant 2-tuple linguistic variables | [145] | 1 | Interval neutrosophic sets | [29] | 1 | Probability hesitant fuzzy sets | [78] | 1 | Interval-valued hesitant fuzzy sets | [70] | 1 | Continuous interval-valued linguistic term set | [119] | 1 | Z-numbers | [182] | 1 | Linguistic Z-numbers | [198] | 1 | Rough cloud model | [31] | 1 | q-Rung orthopair fuzzy sets | [118] | 1 | q-Rung interval-valued orthopair fuzzy sets | [65] | 1 | Ordered weighted hesitant fuzzy sets | [20] | 1 | Single-valued complex neutrosophic sets | [45] | 1 | Single-valued triangular neutrosophic sets | [154] | 1 | Hesitant fuzzy linguistic term sets | [176] | 1 | Double hierarchy hesitant linguistic term sets | [197] | 1 | Hesitant fuzzy linguistic sets | [174] | 1 |
|
|