In manufacturing systems, real-time is a cost feature. Theoretically, the more time a product takes in system, the more value will be added; therefore, production units need to feasibly utilize manufacturing resources in terms of optimal system utilization. For typical manufacturing systems, loading and unloading processes need to operate synchronously with the other system processes. In this applied research work, simulation model for the loading and unloading has been developed for a local manufacturing company to optimize the time and capacity utilization of the system. Real-world data from the system has been collected and used for the modeling. This paper’ research approach has been based on developing simulation model for the current loading and unloading processes, and then; after the validation, analyzing the compatibility of the entire system in terms of loading and unloading processes with the manufacturing system capacity. Rockwall software platforms ARENA, Input Analyzer, and Output Analyzer have been used for simulation and analysis. The results show the powerful of the simulation to model this critical process, minimum time and maximum production units are possible optimizing the loading and unloading processes with the manufacturing system.