Amazon claims to be data driven, so it assumes that a manager can stack rank their employees and select the lowest performer. But let's all be totally honest here, it's impossible to quantitatively rank employee performances. Any real attempt to do this results in Goodhart's law.

So either managers follow some quantitatve measurement (most CRs, least revisions, most stories done, etc) and ignore things that matter and can't be measured. Or they attempt some sort of qualitative measurement that almost always turns into who YOU (the manager) is most comfortable working with.

Stack ranking and cutting is a broken system that is inhuman. But it fits right in with Bezos' transactional mindset.