Certain interfaces are required to exchange data between MES products and ERP systems. The MES products provide certain function blocks (FuBa) for this purpose. These are forwarded to the ERP system via the MES-ERP-Gateway. The MES-ERP-Gateway is configured user-specifically for this purpose in order to adapt the MES function blocks to the respective ERP interfaces. The function blocks via which the MES products can exchange information are described below.