Widiasih, W., and F. Muslim. “Developing of a Multi-Project Planning and Control System for Risk-Based Precast Concrete Procurement to Increase PT. XY’s Competitiveness”. International Journal of Science, Technology & Management, Vol. 5, no. 6, Nov. 2024, pp. 1378-85, doi:10.46729/ijstm.v5i6.1198.