With the rapid development of fashion, it can boost labor-intensive industry players, especially in the garment sector. PT PBT is a garment company that produces make to order. This research will be carried out on jacket products, this is because it is in the old preparation department, causing a lot of waiting time. In addition, line balancing on PpA and Quilting processes is one of the focuses of this study. The purpose of this study is to identify the location of the bottleneck in the production process, in addition to knowing the bottleneck at the work station. The method used in this research is a simulation model. From the simulation results, it is found that two work stations have more than 50% full process so that improvements are made to the second scenario which can increase the total exit by 14%, besides that, it can reduce the average time in the system by 2% and reduce the average time in operation by 13%.