Abstract: Most aeronautical specialized supply chains accept orders with a variety of priorities, with high-priority orders being less common than low-priority orders. Ideally, they need to complete processing these orders before their process time runs out, since completing it after the deadline might result in fines for the company. In this study, we use the concept of cellular automaton to analyze the dynamic behaviour of ultimate critical time orders with multiple priorities. The simulator provides the possibility to investigate the influence of different process parameters on the system load, based on a cellular automaton concept for transport in networks. The simulation results help us to understand the dynamic behaviour of orders with multiple priorities.