The Service shall establish an employee performance appraisal process. The employee performance appraisal process may include: Employee performance planning; Interaction between an employee and the employee's supervisor; and Review of an employee's performance. An employee's supervisor shall conduct a performance appraisal of the employee at least once a year. The supervisor shall evaluate the employee on the basis of the employee's performance during the preceding calendar year. The employee performance appraisal process shall: Provide a standard method for evaluating employees; Specify performance criteria for types of employment positions; Be related to the Service's annual planning process; Provide at least two types of supervisory review; Allow an employee the opportunity for input in the performance appraisal process; and Allow an employee to request training or other developmental assistance to improve performance for the next evaluation period.