However, this categorisation of R&D is not meant to be interpreted as linear as it is possible that findings from experimental development can adapt or change basic knowledge. The key criteria determining the type of R&D is the expected use of the results, in particular how far in the future and in what field the knowledge can lead to any application. While the objectives of an R&D activity can differ, the fundamental principle of R&D is that the aim of the activity should always be to generate new knowledge.