“…Such systems can be found in every field. That's why the theory has seen applications in various fields e.g., aviation industry (Delcea et al, 2021), energy sector (Wu et al, 2019;Xie et al, 2021), construction sector (Mahmoudi et al, 2021a), healthcare sector (Delcea & Bradea, 2017;Javed & Liu, 2018), supply chain management (Mahmoudi et al, 2021b), tourism sector (Javed et al, 2020), among others. Grey Relational Analysis is an important part of Grey System Theory and is primarily used for ranking of factors.…”