Puryani, P., and S. Sutrisno. “Development of Multi-Criteria Decision Making Model in the Packaged Beverage Industry to Minimize Production Costs and Maximize Machine Utility Using the Step Method”. RSF Conference Series: Engineering and Technology, vol. 1, no. 1, Nov. 2022, pp. 535-44, doi:10.31098/cset.v1i1.427.