Large engineered systems do not often live out their lifecycles as originally planned. Traditional design methods do not address redesign issues that arise during the operation of these systems. The problem of how to consider the environmental impacts of stranded assets is especially problematic. This paper presents a method for analysis of a dynamically changing system that includes consideration of both economic and environmental impacts. A case study of an electrical power system illustrates the approach. The results provide several insights that were gained through the ability to forecast the environmental impact caused by lifecycle changes of a system, such as early retirement or operational life extension of facilities.

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