What are the five functions of human resource management?

I have consulted CUHK about the function of human resource management. At that time, I said that human resource management has five functions: (1) acquisition: according to the required personnel conditions determined by the enterprise goals, through planning, recruitment, examination, assessment, selection and acquisition of the personnel needed by the enterprise. The acquisition functions include position analysis, human resource planning, recruitment, selection and use. (2) Integration: Through the effective integration of corporate culture, information communication, harmonious interpersonal relationship and conflict resolution, the goals, behaviors and attitudes of individuals and the masses within the enterprise tend to the requirements and concepts of the enterprise, thus forming a high degree of cooperation and coordination, giving play to the collective advantages and improving the productivity and efficiency of the enterprise. (3) Maintenance: through a series of management activities, such as salary, assessment and promotion, employees' enthusiasm, initiative and creativity are maintained, the legitimate rights and interests of workers are safeguarded, and employees are ensured to have a safe, healthy and comfortable working environment in the workplace, thus enhancing employees' satisfaction and making employees feel at ease and satisfied with their work. The maintenance function includes two activities: one is to maintain the enthusiasm of employees, such as fair salary, effective communication and participation, and harmonious labor relations. The second is to maintain a healthy and safe working environment. (4) Evaluation: Comprehensive assessment, appraisal and evaluation of employees' work performance, labor attitude, skill level, etc., so as to provide a basis for making corresponding decisions such as rewards and punishments, promotion and demotion, and staying or staying. Evaluation functions include job evaluation, performance appraisal and satisfaction survey. Among them, performance appraisal is the core and the basis of human resource management, reward and punishment, promotion and other decisions. (5) Development: through employee training, job enrichment, career planning and development, the quality of employees' knowledge and skills can be improved, so that their labor ability can be enhanced and brought into play, their personal value and contribution rate to the enterprise can be maximized, and the common development of employees and enterprises can be realized. Enterprises should make rational use of the five functions of human resource management to improve the work performance and career development level of employees.