The ACLS should be part of a comprehensive evaluation process which minimally includes record review and interview to ascertain occupational history, present needs, and the person’s goals. While the ACLS can be administered in 20 minutes its purpose is to provide an estimate of abilities, and the scores obtained must be verified by further assessments. ADM assessments target a narrower range of abilities on the Allen scale and are selected based on ACLS scores or other skilled observation.