Optimization of Cost Performance Index in Construction Project Based on Influencing FactorsLila Ayu Ratna Winanda, Wahyu Liani Dewi, Hadi Surya Wibawanto and Yosimson Petrus ManahaE3S Web Conf., 476 (2024) 01019DOI: https://doi.org/10.1051/e3sconf/202447601019