Zhan, Z., Wang, C., Yap, J.B.H., Samsudin, S. and Abdul-Rahman, H. 2019. EARNED VALUE ANALYSIS, IMPLEMENTATION BARRIERS, AND MATURITY LEVEL IN OIL & GAS PRODUCTION. The South African Journal of Industrial Engineering. 30, 4 (Dec. 2019), 44–59. DOI:https://doi.org/10.7166/30-4-2030.