ArowoloMatthew O., AdekunleAdefemi A., and FadijiA. Ezekiel. 2020. “PERT MATHEMATICAL MODEL DEVELOPMENT FOR THE SUPPLY OF DOMESTIC WELL-WATER TREATMENT PLANT”. FUDMA JOURNAL OF SCIENCES 4 (2), 552 -66. https://doi.org/10.33003/fjs-2020-0402-238.