Hi Nitin
Partner Determination procedures are linked to Business Transaction and other CRM Objects to indicates what Partners are linked to the given Object.
Sound like you need to check out SAP Help.
There a lot of content there to help you get up to speed on the relevant topics.
http://help.sap.com/saphelp_crm700_ehp02/helpdata/en/19/68a028d02b460fa899066d948ed3ab/frameset.htm
Regards
Arden