A good business continuity plan, to be considered truly effective, must meet three main criteria: resilience, recovery and contingency.
Resilience: a Business Continuity Plan must provide the right answer to a specific question, absorbing the negative events without interrupting the main service.
Recovery: a BCP should be able to recover everything (data, information, etc..) gone damaged or lost, providing the original state of the process and its full functionality within the shortest time possible.
Contingency: offer a solution to every accidental circumstance. The Business Continuity Plan must provide the ability to survive at any sudden event without interrupting the operation or business growth.