Recovery Time Objective (RTO) 

 Definition(s):

Time goal for the restoration and recovery of functions or resources based on the acceptable downtime and acceptable level of performance in case of a disruption of operations. 

Source: ASIS –  Business Continuity

The overall length of time an information system’s components can be in the recovery phase before negatively impacting the organization’s mission or mission/business processes.

 Source: NIST – SP 800-34 Rev. 1 – Contingency Planning Guide for Federal Information Systems