Business continuity planning (BCP) is “planning which identifies the organization's exposure to internal and external threats and synthesizes hard and soft assets to provide effective prevention and recovery for the organization, whilst maintaining competitive advantage and value system integrity”.
It is also called
Business Continuity & Resiliency Planning (BCRP). The logistical plan used in BCP is called a business Contingency plan. The intended effect of BCP is to ensure business continuity, which is an ongoing state or methodology governing how business is conducted ( source Wikipedia)
In plain language, BCP is working out how to stay in business in the event of disaster.  Incidents include local incidents like building fires, regional incidents like earthquakes, or national incidents like pandemic illnesses.
There are two standards:
25999 BSI (British Standard Institute) and the ISO/IEC 17799
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B4Q works with 25999 BSI standard