Strategic analysis and optimization of highly integrated production networks is an essential requirement for cost-effective and resource-efficient production. A comprehensive software-based concept for modelling, simulation, optimization, and visualization of an integrated silicone production network is presented. A Verbund model was implemented starting with primary material streams in one business unit up to the modelling of all energy, waste, and cost streams in several business units. The system's flexibility enables different levels of detail for modelling processes and parts of the network. The proactive implementation of technical measures and projects based on the assessment of future scenarios is an important outcome of the Verbund simulation.