This thesis deals with regional politics in general and, specifically, with the evaluation of transnational cooperations. In detail, the question of to what extent the success of transregional politics can be assessed as. The goal of this thesis is, to show, based on the evaluation of three case studies, whether or not a collaboration is successful and, which factors influence the general success. Primarily, in order to specify this ample topic, this thesis gives an overview of the regional politics, transnational programs and institutions. Due to the analysis of scientific literature, the evaluation of regional politics will be closely monitored, in order to further deal with the evaluation of success. Within the scope of the evaluation, different measures of control are applied, which measure the success and which results will further be discussed as a condition for success. These measures are necessary in order to judge the level of success and, furthermore, to identify factors, which influence success in general. The results reveal, that a successful cooperation is bound to numerous conditions, which reflect the sources required for an efficient implementation of measures. It appears, that the combination of the analysis of transnational cooperations and the involvement of the conditions of success are a key factor in order to process a statement. Nevertheless, the evaluation of success concerning the cross-border cooperations is afflicted with methodological difficulties, which complicates a complete evaluation.