Phiri C, Mahlangu LC. Assessing the Effect of Performance Management Systems on Operational Efficiency and Service Delivery at Eastern Water and Sanitation Company Limited (EWSC). EAFJ [Internet]. 2025 Jul. 4 [cited 2026 Apr. 16];4(3):48-61. Available from: https://ijcsacademia.com/index.php/eafj/article/view/286