What exactly are you trying to measure? What is productivity? The only one that ever made sense to me was predictability. If someone says it would take x time i

What exactly are you trying to measure? What is productivity? The only one that ever made sense to me was predictability. If someone says it would take x time it should take x time. But even that can be gamed. Trying to measure dev productivity analytically has been historically a fool's errand. It never makes more money for you.