GRETA’s evaluation reports are the result of information gathered from a variety of sources. They contain an analysis of the situation in each Party regarding action taken to combat trafficking in human beings and suggestions concerning the way in which the country may strengthen the implementation of the Convention and deal with any problems identified.  In its assessment, GRETA is not bound by the case law of judicial and quasi-judicial bodies acting in the same field, but may use them as a point of departure or reference. The reports are drawn up in a co-operative spirit and are intended to assist States in their efforts; they can offer support for the changes on which the national authorities have already embarked, and lend legitimacy to the direction of national policies. Because of its multidisciplinary and multinational composition, and as a consequence of its independent approach, GRETA provides a professional and impartial international voice in this process.