V. Bulanan, D.E. et al. 2026. Optimization of Collection Efficiency and Process of the Magalang Area Office Branch of Pampanga I Electric Cooperative, Inc. (Pelco 1). Engineering And Technology Journal. 11, 04 (Apr. 2026), 9383–9408. DOI:https://doi.org/10.47191/etj/v11i04.08.