Why do you want to measure the productivity of the engineers in isolation when their ability to deliver value depends on other people? Too often the answer to t

Why do you want to measure the productivity of the engineers in isolation when their ability to deliver value depends on other people? Too often the answer to that questions boils down to 'ammunition for the blame game'. If your engineers can't deliver value because of say product, who cares how productive they are? Measure business outcomes - you will get what you measure. If engineering is being measured by the ability to deliver business outcomes but engineers can't because of other people, the software engineers are going to let you know* and it's an important thing to learn about and fix. *this assumes you have competent managers and engineers who are willing to communicate with those managers, but if you don't have that, this is sort of a moot point.