One of the design philosophies of DevOps is that you continually measure and evaluate. In order to measure, you need metrics. Only by measuring we can co-relate the principles to the real world.
Lead time
The lead time is the total amount it takes for work to add value to the customer. This time starts as soon as the work item is created. High lead time can mean that the process is stuck waiting for other teams to continue the work.
%Complete/Accurate
Often shown as %C/A is the ratio between input that can be used versus input that can not be used. An example of this is a process where you need input from another team before you can start work. If this input is often incomplete, the %CA is low. If the process is efficient and you receive the correct input often, the %CA is high.
High %CA will increase flow and is something you should strive for..