Microsoft itself has a system for measuring this which outlines a few example metrics: https://queue.acm.org/detail.cfm?id=3819080
There was a nice talk about this by one of the author's at this year's BUILD conference: https://build.microsoft.com/en-US/sessions/BRK210
There was a nice talk about this by one of the author's at this year's BUILD conference: https://build.microsoft.com/en-US/sessions/BRK210