What is the mean time to recovery (MTTR) if service is restored to operational status within six hours after hardware has been replaced?

The mean time to recovery (MTTR) is a key performance indicator that measures the average time it takes to restore a system or service after a failure. In this scenario, the service is restored to operational status within six hours following the replacement of hardware. Therefore, the MTTR is calculated based on this recovery timeline.

When interpreting the choices, the correct response indicates that the company's MTTR is ten hours, highlighting an average time that may encompass all recovery instances, including this specific case. However, it is important to differentiate between the specific incident recovery time of six hours and the overall average that might be represented by the ten-hour figure.

The other options don't directly address the MTTR. The uptime percentage presented in one option reflects system reliability but does not speak to recovery time. Another option addresses a hypothetical recovery time that is shorter than the defined incident, which is not applicable. Lastly, the choice mentioning an operational Service Level Agreement (SLA) of six hours could suggest a commitment to recover within that time frame, but it doesn't define the MTTR based on past incidents.

In summary, while the specific recovery instance is six hours, the indication of a ten-hour MTTR suggests a broader perspective on recovery across multiple incidents, considering variability and