DRP = IT BCP.

DR is the IT portion of the BCP Business Continuity Planning. It handles the recovery of the computer systems (for example if the data centre is on fire or the server breakdowns).

DRP = IT BCP.

BCP takes care of the business processes recovery for example if the factory or the business premises is burnt down. There must be a business resumption strategy to recover the critical business processes.

Before developing a BCP (including IT BCP), a BIA (Business Impact Analysis) should be conducted to determine the criticality of the business processes and the recovery priority.

A good example of IT BCP template are available from:-

NIST IT Contingency Planning Guide

csrc.nist.gov/publications/nistpubs/800-34/sp800-34.pdf