We can build a high fidelity model of your system using Simulink. Based on the information on your system, the model will replicate the behavior of the real system. The model can include very complex parts and components that reliably replicate the behavior of your system. The modeling of your system is only limited by the amount of information available about your system. As your system is increasing in maturity, more information will be available about its behavior; this information can be fed back into the model to further increase its fidelity.
The following is a typical example of a complex system model in Simulink.