Hi Pawan,
Is your company covered under any quality system, i.e., ISO, GMP, OSHAS, etc.? If it is, then replies from our friends to this mail would suffice your purpose. If you are not covered under any system, then my advice for conducting an HR audit would be to divide the HR activities into three parts: A) Statutory B) Non-Statutory/Welfare C) Developmental.
In the statutory part, you can cover all the compliances of labor laws. If you have faced an inspection by GLO/PF/ESIC inspectors, then you can audit other departments easily.
In welfare, you can cover activities like recreation, canteen, transport, etc.
For developmental activities, you can cover training identification of all employees, appraisal guidelines being properly followed or not, training for all employees being completed or not, whether training feedback is taken or not, whether the effectiveness of training is calculated or only discussed, and whether exit interview procedures are followed or not. The list for all three mentioned above is exhaustive. Based on the list, prepare open-ended questions and proceed to do audit jobs.
Regards,
Ashish