The eco-efficiency of actual production processes is still one dominating research area in engineering. However, neglecting the environmental impacts of production equipment, technical building services and energy supply might lead to sub-optimization or burden-shifting and thus reduced effectiveness. As an established method used in sustainability management, Life Cycle Assessment aims at calculating the environmental impacts from all life cycle stages of a product or system. In order to cope with shortcomings of the static character of life cycle models and data gaps this approach combines Life Cycle Assessment with manufacturing system simulation. Therefore, the two life cycles of product and production system are merged to assess environmental sustainability on product level. Manufacturing simulation covers the production system and Life Cycle Assessment is needed to relate the results to the final product. This combined approach highlights the influences from dynamic effects in manufacturing systems on resulting life cycle impact from both product and production system. Furthermore, the importance of considering indirect peripheral equipment and its effects on the manufacturing system operation in terms of output and energy demands is underlined. The environmental flows are converted into impacts for the five recommended environmental impact categories. Thus, it can be demonstrate that Life Cycle Assessment can enhance the process simulation and help identify hot-spots along the life cycle. The combined methodology is applied for analysing a case study in fourteen scenarios for the integration of volatile energy sources into energy flexible manufacturing control.

实际生产过程的生态效率仍然是工程学的主要研究领域。但是，忽视生产设备，技术建筑服务和能源供应对环境的影响，可能会导致次优化或负担转移，从而降低有效性。作为在可持续性管理中使用的既定方法，生命周期评估旨在计算产品或系统所有生命周期阶段的环境影响。为了解决生命周期模型的静态特性和数据缺口的缺点，该方法将生命周期评估与制造系统仿真相结合。因此，将产品和生产系统的两个生命周期合并在一起，以评估产品级别的环境可持续性。制造模拟涵盖了生产系统，需要进行生命周期评估以将结果与最终产品相关联。这种组合的方法突出了制造系统中动态影响对产品和生产系统所产生的生命周期影响的影响。此外，强调了考虑间接外围设备及其对制造系统运行的影响（就输出和能量需求而言）的重要性。将环境流量转换为对建议的五个环境影响类别的影响。因此，可以证明生命周期评估可以增强过程仿真并帮助识别生命周期中的热点。