To a large extent, the same actors should be involved, and structures or tools built to facilitate assessment activities could also be useful in the implementation stage. This potential should be realised as far as possible. It will therefore be necessary to carefully assess capacity-building needs, and promote and facilitate capacity-building activities that address those needs, for example to assess needs to improve access to data, information and knowledge that could help underpin assessment processes, and for increased experience in developing and using tools, such as scenarios and indicators.