You mean to say that the metrics are applied post-hoc. I.e. you reward last month's efficiency this month. Otherwise, you incentivize poor performance all the

You mean to say that the metrics are applied post-hoc. I.e. you reward last month's efficiency this month. Otherwise, you incentivize poor performance all the time, so that I can show massive improvement on this month's "efficiency push", next months "productivity (lines of code, completed stories) push", the "bug bash", etc.