“…The key areas of Grey System Theory include grey relational analysis, grey generating space, grey forecasting, grey decision making, grey control, and grey mathematics. Grey System Theory has seen application in numerous fields, including agriculture (Tan et al, 2014), supplier selection (Mahmoudi et al, 2021a), economic growth analysis (Huang et al, 2020), health care management (Aydemir & Sahin, 2019;Javed and Liu., 2018), sustainable development (Ikram et al, 2021;Abid et al, 2021), environment (Hao et al, 2006), electromagnetic data processing (Jiang et al, 2017), traffic flow prediction (Xiao et al, 2020), energy and emissions (Chen et al, 2021;Zhu et al, 2019), project management (Sheikh et al, 2019;Javed & Liu, 2019), machine learning (Xie et al, 2021;Ma, 2019), among others. It can be seen that the application of Grey System Theory is widespread and multi-disciplinary.…”