Accelerate: The Science of Lean Software and DevOps: Building and Scaling High Performing Technology Organizations

by Nicole Forsgren

delivery lead time, deployment frequency, time to restore service, and change fail rate.

Lead time is the time it takes to go from a customer making a request to the request being satisfied.

the time it takes to design and validate a product or feature, and the time to deliver the feature to customers.

delivery lead time as the time it takes to go from code committed to code successfully running in production,

what percentage of changes to production (including, for example, software releases and infrastructure configuration changes) fail.