Table 7.
Frequencies of normalisation techniques
| Studies | Layer | Method | N1 | N2 | N3 | N4 | N5 | N6 | N7 | N8 | N9 | N10 | N11 | N12 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pamučar et al. (2020) | Evaluation | LBWA–MACBETH–RAFSI | – | – | – | – | – | – | – | – | – | – | – | ✓ |
| Ocampo and Yamagishi (2020) | IF–DEMATEL | – | – | – | – | – | – | – | – | – | – | – | ✓ | |
| Wu and Xu (2020) | TODIM | – | – | – | – | – | ✓ | – | – | – | – | – | – | |
| Yang et al. (2020) | SpNoFWBM | – | – | – | – | – | ✓ | – | – | – | – | – | – | |
| Sayan et al. (2020) | TOPSIS | – | ✓ | – | – | – | ✓ | – | – | – | ✓ | – | – | |
| Mohammed et al. (2020) | TOPSIS | – | ✓ | – | – | – | – | – | – | – | – | – | – | |
| Naeem et al. (2020) | PmF-TOPSIS | – | ✓ | – | – | – | – | – | – | – | – | – | – | |
| Ortiz-Barrios et al. (2020) | TOPSIS | – | ✓ | – | – | – | – | – | – | – | – | – | – | |
| Wan et al. (2021) | VIKOR | ✓ | – | – | – | – | – | – | – | – | – | – | ✓ | |
| Bharsakade et al. (2021) | F-AHP | ✓ | – | – | – | – | – | – | – | – | – | – | – | |
| Mishra et al. (2019) | HF-ARAS | ✓ | – | – | ✓ | – | – | – | – | – | – | – | – | |
| Ashraf and Abdullah (2020) | TOPSIS-GRA | ✓ | – | – | – | – | – | – | – | – | – | – | – | |
| Jain et al. (2021) | VIKOR | ✓ | – | – | – | – | – | – | – | – | – | – | – | |
| Ghorui (2021) | HFS-TOPSIS | ✓ | – | – | – | – | – | – | – | – | – | – | – | |
| Grida et al. (2020) | TOPSIS | ✓ | – | – | – | – | – | – | – | – | – | – | – | |
| Ghosh et al. (2020) | F-AHP | ✓ | – | – | – | – | – | – | – | – | – | – | – | |
| Shah et al. (2020) | F-VIKOR | ✓ | – | – | – | – | – | – | – | – | – | – | – | |
| Lam et al. (2021) | F-VIKOR | – | – | – | – | – | – | – | – | ✓ | – | – | – | |
| Yao (2021) | F-VIKOR | – | – | – | – | – | – | – | – | – | ✓ | – | ✓ | |
| Ecer and Pamucar (2021) | MARCOS | – | – | – | – | – | ✓ | – | – | – | – | – | – | |
| Althaf and Babbitt (2021) | TOPSIS | – | ✓ | – | – | – | – | – | – | – | – | – | – | |
| Mardani et al. (2020) | WASPAS | – | ✓ | – | – | – | – | – | – | – | – | – | ✓ | |
| Percentages % | 36.36 | 22.72 | 0 | 4.54 | 0 | 18.18 | 0 | 0 | 4.54 | 9.09 | 0 | 22.72 | ||
| Abdulsalam and Hossain (2020) | Development | TOPSIS | – | ✓ | – | – | – | – | – | – | – | – | – | – |
| Albahri et al. (2020) | VIKOR | ✓ | ✓ | – | – | – | – | – | – | – | – | – | – | |
| Hezam et al. (2020) | AHP | ✓ | ✓ | – | – | – | – | – | – | – | – | – | – | |
| Percentages % | 66.66 | 33.33 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
N/A = Not applicable
() = Including
(–) = Not including