Sustainability and, in particular, green sustainability are very complex subjects, because they typically include several integrated sub-systems. Many of these contain dynamically changing objects and variables, which are often difficult to measure and calibrate. Green sustainability means waste reduction and optimization with a non-toxic process focus that can be maintained over time, for a very long time. Furthermore, it means the ability of an ecosystem to maintain ecological processes and functions, biological diversity and productivity over time. Sustainable, green engineering design, manufacturing, demanufacturing and re-engineering are changing every aspect of our lives. In this paper, we offer an overview, a systems engineering framework, as well as some methodology and concrete results.
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