DDS evaluates if the appliance has a medically determinable physical or mental impairment. This requires necessary documentation. If it is determined one does, DDS decides if the impairment is defined as “severe”. The definition used by DDS considers an impairment severe if it significantly limits one's physical or mental ability to do basic work. If severe, the applicant continues the application and if not, the applicant is not eligible as they are not considered disabled.