The European Union makes enormous investments in R&D and Innovation projects. The total budget for the H2020 program alone is nearly €80 billion. How can we avoid re-inventing the wheel in new projects? How can we ensure that the results from these investments are being reused? In our society at large, in businesses, in future projects? In H2020, all proposers are asked to describe how they plan to ensure the sustainability of the results, but what do we actually mean by ‘sustainability’? And how can it be achieved?