This document describes the original process and standards HomVEE used to review research from impact studies. In 2020, HomVEE released a Handbook of Procedures and Standards: Version 2. Those newer procedures and standards, which can be found on the HomVEE website alongside this original version (https://homvee.acf.hhs.gov/publications/methods-standards), are in effect beginning with the 2021 annual review and until any subsequent version of the procedures and standards. (author abstract)