Abstract: The purpose of this study is to simplify the complexity of process flow in manufacturing companies and evaluate the improved process flow using Arena Simulation. Lean is a method for continuous improvement and elimination of wastes, it can be applied in to any process including the processes in manufacturing. This study aimed to simplify the complexity of process flow and examine the improved process flow with Arena Simulation. The qualitative research method is applied in this study and the data will be collected by using observations and surveys. Then, the data collected will be analyzed by using Arena Simulation. In conclusion, this paper has successfully accomplished the objectives as the improved process flow results in a greater output of 346 compared with 303. And also, the effectiveness and efficiency of productivity increase as the total time used in the process decrease at most 31.61%.

Keywords: Lean, Complexity, Arena Simulation