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The electric power grid is a crucial part of societal infrastructure and needs constant attention to maintain its performance and reliability. European grid project investments are currently valued at over 5 billion Euros and are estimated to reach 56 billion by 2020 . Successful smart grid deployment will require a holistic analysis and design process if it is to function properly and in an environmentally sustainable way. The entire system must be treated as integrated, not as isolated parts . System integration and full customer engagement are crucial elements of this development. An evaluation of European smart grid projects showed that it was very difficult to grasp technological and non-technological key characteristics of this complex system .