Earlier quoted context omitted.
Simply: does revenue exceed cost of running it? The book I referred to answers the "but engineering team doesn't have revenue". Engineering can be art, sure, and if you like, we can even discount the idea that art creation can be seen as economic activity. But is there a need to measure productivity then?
Engineer A built the new widget that Sales have been talking about for months. This immediately generates $1m in revenue. Engineer B removed some tech debt. Future efforts to build widgets will take less time to build. Engineer C rewrote the backend to prevent a vulnerability exposure that could have lead to disaster. Who was most productive? Who deserves a raise?
Engineer D spent months working on a project that was cancelled by management
Engineer E was tasked to build a feature that no customers ended up using
Productivity is a team effort. Even most brilliant engineer will be unproductive if they're given unproductive work