In the coalition agreement for the 18th legislative period, the governing parties agreed that a national Climate Action Plan 2050 was to include "concrete measures formulated in the course of broad dialogue". The dialogue process began in June 2015 and ended officially in a closing event held in February 2017. The drawing up of the Climate Action Plan 2050 and its regular updating are intended as a 'learning process'. These regular updates will be accompanied by a process of social dialogue, the exact format of this process has yet to be decided. Against this background and with a view to also including the public in future projects, the BMUB commissioned Prognos AG to evaluate stakeholder involvement in the compilation of the Climate Action Plan 2050. This study will reveal which aspects of the dialogue process have fostered constructive involvement on the part of stakeholders and citizens and which aspects have had a negative influence on the legitimacy, transparency and accountability of the dialogue process.