if you cannot measure it, you cannot improve it” - Peter Drucker.
According to research elite high performing teams have significantly higher count of code deployments, lead time is faster, recover faster, and have a lower failure rate.
The total elapsed time from point when a user story enters the backlog. Until the time it is completed - including the time spent waiting in the backlog
The time it takes for a story to go from being “in progress” to Done.