Strategic analysis and optimization of highly integrated production networks is an essential requirement for cost-effective and resource-efficient production. This paper presents a comprehensive software-based concept for modeling, simulation, optimization, and visualization of an integrated silicone production network of Wacker Chemie AG. A Verbund-Model was implemented in a step-by-step approach, starting with primary material streams in one business unit up to the modeling of all energy, waste, and cost streams in several business units. The system's flexibility enables different levels of detail for modeling processes and parts of the network: from simple input-output relations to complex, nonlinear equations and specifications. The proactive implementation of technical measures and projects based on the assessment of future scenarios is an important outcome of the Verbund-simulation.