W. Va. Code R. § 143-1-15
The Director, after consultation with the appointing authorities, and with the approval of the Board, shall establish and make effective a system of performance evaluation designed to provide a valid evaluation of the quality and quantity of work performed by employees. Insofar as practicable, the system of performance evaluation in the classified service shall be standardized. The appointing authority shall prepare and record evaluations for all permanent employees at regular intervals not to exceed twelve (12) months. The appointing authority shall consider performance evaluations as well as other recorded indicators of performance in determining salary advancements and in making promotions, demotions, and dismissals. The appointing authority shall notify an employee of his or her performance evaluation in writing and shall retain copies of performance evaluations in the employee's personnel record.
W. Va. Code R. § 143-1-15