In this study, a simulation study was carried out in order to increase the production efficiency of a company that produces hoodies. The simulation technique has been included in many studies for line balancing in the apparel industry. However, in this study, unlike others, an algorithm that can be easily applied is proposed for the software practitioner to use in the alternative model development process in order to increase the efficiency of an existing production line. Based on real production line data, a waves algorithm was applied in the simulation model, whose verification and validity processes were completed. In the results obtained with the help of the waves algorithm (acting according to two different assignment scenarios), it was determined that the average production values per person had increased.