A Sustainable Decision-Making Framework for Open Pit Mining Site Selection: An Integrated Step Method and Multi-Attribute Utility TheoryBenazir Imam Arif Muttaqin, Udisubakti Ciptomulyono, Nurhadi Siswanto and Salman AlfarisiE3S Web Conf., 645 (2025) 01001DOI: https://doi.org/10.1051/e3sconf/202564501001