AbstractIn this chapter, the central question is which core activities you will undertake in order to achieve your goal, organizing your value proposition with success. Because you are working towards a specific goal, and with selected strategies, it is useful to state which (core) activities are necessary to realize your sustainable business model. The idea of a core activity is that a specific part of the organizational activities can be seen as the speciality of a company, a network, or a

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... munity: it tells what they are really good at. Core activities should contribute to operationalizing the chosen strategy, thus contributing to the realization of the overall goal, coherent with the value proposition. We offer a core activities framework based on the conventional sustainability trio: reduce, reuse, recycle. This has evolved over the years into a whole family—commonly referred to as the RE-strategies and presented here as the 13 REs.