The research project, funded by the German Environment Agency (UBA), aimed to enhance a methodology for the ex-ante evaluation of climate adaptation policy instruments to support APA IV. A multi-criteria approach was developed in collaboration with a network of public authorities, focusing on effectiveness, costs, sustainability, and interactions. The methodology was successfully applied and led to joint policy recommendations for the Interministerial Working Group on Adaptation to Climate Change. The report summarizes the approach and results of the methodology’s development, testing, and application, and outlines options for future refinement. The report is in German, but it includes an extensive English summary.