The U.S. Social Security Administration has requested that the National Academies of Sciences, Engineering, and Medicine conduct a study to (1) provide an overview of ways to collect information about the functional abilities an adult needs to meet the physical and mental demands of work; (2) discuss types of information that support findings of limitations in functional abilities relevant to work requirements as defined by the Department of Labor for the Occupational Information System (OIS); and (3) provide findings and conclusions regarding the collection of information and assessment of functional abilities relevant to work requirements.