Maximum Tolerable Downtime (MTD) determines the maximum time a business can tolerate the absence or unavailability of a particular application.

Downtime consists of two elements, the Recovery Time Objective and the Work Recovery Time: MTD = RTO + WRT

MTD level will be calculated automatically according to RTO and WRT levels, it cannot be modified manually.

-Critical (maximum tolerable downtime is seconds)

-Serious (maximum tolerable downtime is minutes)

-Significant (maximum tolerable downtime is hours)

-Minor (maximum tolerable downtime is days)