12-4. As the figure indicates, the evaluation is based solely on the opinions of the rater, and in many cases the criteria are not directly related to job performance. Although subordinates or peers may use it, the form is usually completed by the supervisor, who checks the most appropriate response for performance dimension. Responses may be given numerical values to allow an average score to be computed and compared. The number of points attained may be linked to salary increases so many points equal a raise of some percentage. Other advantages of this method are that it is inexpensive to develop and administer raters need little training or time to complete the form, and it can be applied to a large number of employees.