An e-commerce business recently experienced a two-hour outage from its hosted web service provider. According to the SLA, the business needs to determine how much data can be restored. On which of the

MTTR (Mean Time To Recover) measures the average time it takes to restore a system after a failure, which is about service uptime, not the amount of data loss.

The Recovery Point Objective (RPO) specifies the maximum allowable amount of data loss, measured in time, that an organization can tolerate during a disaster. By focusing on RPO, the business can ascertain the freshness of the restored data, directly indicating how much data might be unrecoverable from the point of the outage.

MTBF (Mean Time Between Failures) measures the average time a system operates without failure, indicating reliability, not data restorability.

RTO (Recovery Time Objective) defines the maximum acceptable downtime for a system after a disaster, focusing on service restoration duration, not data loss quantity.