The Infineon Dresden 300mm fab is the first wafer fab in the world to run high volume production of power technology products. This requires the coordination of multiple production facilities in the supply chain. Output from one facility is fed as an input to the subsequent facilities in a push or pull operation mode, depending on technology lines. In a push operation mode, lots transition from one facility to another in a continuous manner, while in the pull operation mode, lots are stored and continuation of the lots is triggered by customer order to the supply chain. The latter case triggers the need of synchronizing material flows from one facility to another, and thus requiring an accurate material forecast for better planning and execution. In this paper, we discuss the modelling issues and solutions associated with this challenge, and the use cases of the simulation forecast.