Sahani, S., Mandal, D.N. and Sahani, K. 2024. A Certain Studies on Mathematical Modeling: An Optimization Oriented the Replacement of Items whose Efficiency Deteriorates with Time. Journal of Multidisciplinary Science: MIKAILALSYS. 2, 1 (Jan. 2024), 1-12. DOI:https://doi.org/10.58578/mikailalsys.v2i1.2286.