Using simulation to evaluate site traffic at an automobile truck plant

Recent trends in automotive manufacturing have increased the focus on the Just-In-Time (JIT) delivery of automotive components. By requiring smaller batches of parts delivered more frequently, automobile assembly plants now need methods for handling and understanding how the increased traffic will effect the safety and operation of their overall site. This paper focuses on the use of discrete event simulation to address the many traffic related issues brought on by this more aggressive inventory method. The model considered factors such as plant schedule, gate staffing, vehicle production, truck size, travel time, vehicle speed, loading time, and marshalling requirements. The results of the project have helped vendors understand how much time to allow for travel within the General Motors site once the truck arrives with its parts. The paper will also discuss the role 3D simulation played in validating this model and communicating specific simulation results.