This report provides a description of existing policy frameworks and a synthesis of identified AHA-domains and indicators within a long list of potential AHA impact evaluation metrics. It further provides a brief summary on how impact evaluation metrics feed into the overall ASTAHG governance assessment methodology, and how Deliverables D.T2.2.2 (AHA innovation evaluation metrics) and Deliverable D.T2.2.3 (AHA governance assessment methodology) build upon the work conducted in the context of this report.