Hi,
HRM: Human resource is a process of planning, organizing, directing and controlling of the recourse’s and Functions of the organization...
Function are:
1. HRD: Human resource development
2. HRP: Human resource planning
3. HRMIS: Human resource management Information System
4. Industrial law
5. Labour law
6. Compensation and wages
etc
HRP: Human resource planning is a very vast subject, this function purely involved in Manpower recruitment for the organization.
From understanding the Manpower Need, Budget quotation, Number of employees need, Job description, Salary payable, technically skills, Experience or fresher, Education, Sourcing, screening, scheduling interview’s, Interviewing, Nego, Offering etc..
For more detail: you can get in
Wikipedia