“…In this category, most of the studies adopted compromise methods (TOPSIS and VIKOR, for example) [61,63,64,66,[69][70][71], whereas three employed a utility-based method (AHP) [62,64,65], two applied an outranking method (PROMETHEE) [68,69], and the remaining studies [60,67,71,72] used multi-objective methods (e.g., GP and MOLP). Finally, it should be emphasized that four studies [61,64,69,70] combined fuzzy logic with MCDM methods, and one of them [65] employed artificial intelligence algorithms (i.e., Bacterial Foraging Optimization Algorithm and the Firefly Algorithm) to optimize objective functions for the intelligent allocation of energy to different contributors to surface water treatment plants in India.…”