Resilience management - Measure
RTO
(Recovery Time Objective)
The longest acceptable time for getting a system working again after an outage
What's it for?
Sets how quickly an important system must be working again after an outage.
For example…
The customer portal must be restored within two hours of failure
A four-hour RTO means the payroll service must be restored within four hours of a serious outage
Think of it like…
Maximum acceptable wait for the trains to restart after a signal failure