Hi Suryavanshi,
You need to specify the type of fieldwork you wish to undertake.
You need to observe in the HR Dept about the maintenance of employees' files first, to ensure they are complete in all aspects. This includes checking the date of joining, CV accomplished with copies of educational certificates, relieving letters from previous employers, and the date of appraisal.
Secondly, you need to observe the methodology of recruitments and the types of ratings adopted for each position, as well as the various tests conducted for selecting candidates.
Thirdly, observe the methods adopted by the organization for performance appraisals, such as the appraisal form used, the types of ratings given, and the percentage of increments suggested by HR.
Fourthly, you need to observe the statutory aspects like ESI, PF, PT formalities of the organization.
Finally, consider other things like the notice period for employees leaving the organization, the exit interview report submitted by HR, and various other aspects such as issuing memos, warning letters, and show cause notices to employees.
Hope this serves your purpose.
Regards