1) Impact measurement and management is important for impact investors to understand their social and environmental performance, improve investment decisions, and avoid "impact washing".
2) There have been several developments in impact measurement standards and tools over the past decade, including the IRIS catalog of metrics, the Operating Principles for Impact Investing, and the DELTA and AIMM frameworks.
3) Recent frameworks like IRIS+ and methods like those from inFocus aim to increase standardization, comparability, and practical guidance for impact investors in how to define goals, select metrics, and manage performance.