The Instructions for Official Studies require that when an assessment study done should also include an assessment as to when and how recommended measures should be evaluated. In order to establish whether a measure is successful, such measure needs to be evaluated after it has been put into practice. The requirement for evaluation is laid down in Section 16 of the Regulations on Financial Management in Central Government. The study should, to the extent feasible, document the current situation prior to implementation of a measure, thus enabling assessment of the effects of such measure when it is being evaluated. See www.evalueringsportalen.no for guidance on evaluations.  There are several examples of evaluation of government measures