Ir is a vital section of p& a of any organization.more so, the bigger the company. ir is the section which forms the standing instruction of the company which ia the foundation on which the organization discipline and culture is built.ir is the section which maintains close liaison with workers union and is responsible to maintain industrial discipline for well being and the development of organisational culture of the company.all the functions of domestic enquiry,disciplinary action etc is taken care by ir section. initiating vigilance enquiry and follow up also is the function of ir section. the recent trend of forming officer's association and it's liaison will also be looked after by ir. i think that is enough for now.don't worry you will become experts in it soon. god bless you all.