A Queuing System Logistics Model for the Service Users of ABC Savings and Credit Cooperative Limited in Nonthaburi Province

Abstract

This study aims to propose service guidelines for members of the ABC Savings and Credit Cooperative Limited to increase service efficiency using computer simulation. The research compares the current service model with the simulated system to accommodate the maximum number of service users regarding the number of members served, time spent in the system, and time spent in the queue. Data was collected through observation and recording of the inter-arrival time (time between the first customer's arrival and the next) and the service time during normal operating days using Microsoft Excel. Currently, the average number of users during a normal day is 388 people, with a minimum of 350 and a maximum of 422 people. The current service system and the simulated system were validated using the Arena program. The test results showed that the service model during normal days, specifically for the counter section, follows a Beta distribution.Regarding the service improvement guidelines, the study found that the most suitable service model for normal days is Model 2 - 1 - 2, which is defined as: 2 channels for serving 1 item only, 1 channel for serving 1-2 items, 2 channels for serving 3 or more items. The result indicates that this revised service model (Model 2 - 1 - 2) can serve an average of 426 people per day. This demonstrates that the 2 - 1 - 2 service model can better meet the service demands of the members than the current service system.