Leonidas is building a disaster recovery plan for his organization and would like to determine the amount of time that a particular IT service may be down without causing serious damage to business operations. What variable is Leonidas calculating?

The maximum tolerable downtime (MTD) is the longest amount of time that an IT service or component may be unavailable without causing serious damage to the organization. The recovery time objective (RTO) is the amount of time expected to return an IT service or component to operation after a failure. The recovery point objective (RPO) identifies the maximum amount of data, measured in time, that may be lost during a recovery effort. Service-level agreements (SLAs) are written contracts that document service expectations.