An unskilled worker is a worker who performs unskilled work. Unskilled work is defined as "work which needs little or no judgment to do simple duties that can be learned on the job in a short period of time. An unskilled worker can usually learn to do the job in 30 days or less, and little specific vocational preparation and judgment are needed. A person does not gain work skills by doing unskilled jobs." This definition as used to evaluate workers is detailed in 20 C.F.R 404.1568(a).