<Li> FCR (First - Call Resolution): Percentage of incoming calls that can be resolved without the use of a callback or without having the caller call back the helpdesk to finish resolving the case . </Li> <Li> TAT (Turn - Around Time): Time taken to complete a certain task . </Li> <Li> MTTR (Mean Time To Recover): Time taken to recover after an outage of service . </Li> <P> Uptime is also a common metric, often used for data services such as shared hosting, virtual private servers and dedicated servers . Common agreements include percentage of network uptime, power uptime, number of scheduled maintenance windows, etc . </P>

What is the difference between sla and tat