“…This theory focuses on managing the queue and service/operating time in a way to reduce waiting time and ensures maximum disposed entity from the system. Arrival rate of entity (𝜆) and service rate of server (𝜇) are the input variables to mathematically estimate waiting time, queue length, entity number in the queue and the system (Siddiqui et al, 2020). The queuing theory has many useful applications, including traffic flow (Zhao et al, 2019), (Hurtado Lange and Maguluri, 2022), (Maadi et al, 2022), plant location design (vehicle gas charging stations (Said and Mouftah, 2020), (Xiao et al, 2020)), scheduling (jobs on machine, patients in hospitals, online order taking and computer programs), and facility design (post offices, banks, supermarkets, ticket counter).…”