“go-cluster” is a cluster excellence programme in Germany. It supports Germany’s most capable innovation clusters and their transformation into international clusters of excellence. The initiative helps cluster managements to professionalise and to raise the profile of German innovation clusters. To verify the further development of the framework for support the BMWi has commissioned an evaluation of the “go-cluster” programme for the period July 1st 2012 until June 30th 2015. The evaluation has been carried out by the INTERVAL GmbH in cooperation with CONABO UG. This executive summary explains the study’s methodical approach and presents the central findings of the evaluation. It also contains recommendations for the further development of the programme.