I don't understand what you mean. The 4-6% URA target is for continually managing out low performing employees. It may not be the most effective way, but that is the intent. It has nothing to do with resourcing departments properly; that's a totally different process and conversation.

Again, I think you are confusing layoffs, which are a reduction in headcount for a department/team, with attrition, where the people themselves are let go but the headcount remains so you can hire to replace them.