干旱区生态环境知识资源中心

facilities is less than the number of people who need the services. This phenomenon is the result of customer arrival and service time are not balanced. In this case, we use queuing modeling to assist management in determining the optimal number of supermarket's cashiers at Saga swalayan Padang Pariaman. The problem to be reduced are at the crowded time and at the deserted time during office hour of the supermarket to provide optimal performance in service. In this research, we used multiple lines queuing system (M/M/S) for analyzing. The calculation was done manually and using the software "Quantitative for Windows" with waiting lines module. The result of the research revealed that the performances of the existing queuing system was not optimal due to the usage of the payment facility and the cashier skill are still low.