For disaster redundancy centre must meet the commitment of customer ’ s recovery objectives , in light of this , we study the main quantified target of disaster recovery---recovery point objectives , and find the risks of traditional data replication mode in achieving the recovery point objectives , then present the risk model of recovery point objective , and update it to the business scheduling model based on the practical need.The model is applied in day-to-day disaster redundancy work , and achieves the effective management of the disaster redundan-cy centre on the disaster recovery operations with multi-user multi-service , it ensures the normal operation of the centre .%针对灾难备份中心必须达到对客户恢复目标的承诺，研究了灾难恢复主要量化目标---恢复点目标。研究发现传统数据复制方式对达到恢复点目标的风险，从而提出恢复点目标风险模型，并按照实际需求改进为业务调度模型。将模型应用在日常灾备工作中，实现了灾备中心对多用户多业务的灾备作业进行有效管理，确保了灾备中心的正常运营。
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