Such a rich model of productivity would be incredibly powerful if developers, teams, and organizations were a relatively stable phenomena to model. But new developers arrive all the time, changing team dynamics. Teams disband and reform. Organizations decide to enter a new market and leave an old one. All of these changes mean that the phenomena one might model are under constant change, meaning that whatever policy recommendations our rich model might suggest would likely need to change again in response to these external forces. It’s even possible that by having such a seamless ability to
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This explains that even if we measure productivity accurately both in quantitative and qualitative terms, it is still not helpful to the end goal of improving productivity.
