Heryanto, R.M., Suhada, K., Halim, W. and Vania, G. 2023. Determination the Number and Schedule of Security Officers for Pandemic Period and Hybrid Learning at University. PROZIMA (Productivity, Optimization and Manufacturing System Engineering). 7, 1 (Jul. 2023), 73-83. DOI:https://doi.org/10.21070/prozima.v7i1.1618.