A Disaster Recovery plan describes how an organization expects to respond to potential disasters. A disaster recovery plan includes precautions that are and will be taken to minimize the effects of a disaster and steps to "either maintain or quickly resume mission-critical functions". Typically, disaster recovery planning involves an analysis of business processes and continuity needs; it may also include a significant focus on disaster prevention.

A disaster recovery plan (DRP) is sometimes referred to as a business continuity plan (BCP).

Appropriate plans vary from one enterprise to another, depending on variables such as the type of business, the processes involved, and the level of security needed.

from http://searchsecurity.techtarget.com/sDefinition/0,,sid14_gci752089,00.html