Business process re-engineering is an essential part for smart manufacturing companies. It presents the important factors like time, resource utilization and cost before the practical implementation. In particular, time is a significant factor for business process simulation to acquire the customers' satisfaction. It's a challenging task to complete a business process promptly. In this paper, we proposed a process model named M1 by using the BPMN approach on Bizagi simulator to show the business process steps of a tool manufacturing company then we modified M1 and proposed a new process model M2 in order to reduce the working hours that we had by following the processing steps in model M1.