You can choose various functions of HR, like:
Training & Development
Recruitment & Seclection
Performance management System (or specifically performance appraisal)
besides these broad topic, you can choose parameters of these functions to do comparative studies, Like:
Training methods and its impact on transfer of training
Individual characteristics and transfer of training
360 degree performance appraisal of particular company
succession planning and its impact on organization effectiveness
Methods of recruitment and its impact on recruitment effectiveness
I hope above topics will help you somehow.
Thanks & Regards,
You can select following topics for your summer internship:
1. Legal complainces in organization.
2. Performance Management System.
3. Workers Participation in Management.
4. Payroll Administration (Including leave, PF, ESI, PT etc)
5. Recruitment & Selection.
6. Training & Development.
7. Labour welfare & social security measures.
8. HR set up in new organization/existing organization (HR policies/procedures)*
(* This is a different, comprehensive topic)