The basic purpose of the State Personnel Management System is to provide a system of employment for employees under the authority of the Secretary. The State Personnel Management System: establishes categories of service for employees based on the general nature of the employee's duties or method of appointment; and provides procedures for the appointment, discipline, and termination of employees in each service; groups employees into classes based on specific duties that employees perform; and provides a system of pay for employees; provides for a system of merit employment in the skilled service and professional service, regardless of an applicant's political or religious opinions or affiliations or of any standard other than business efficiency; provides a process for the: promotion and training of employees; and prompt removal of employees; and provides for other aspects of human resources management.