I don’t understand why you would PIP a person and keep them waffling around for months on end collecting paychecks when you can just severance them out and pay less in time and money?
PIP = "Paid Interview Period"
I've never seen anyone recover from a PIP.
i.e. "Maybe if we spook them, we can get the work of two people out of them for a while."
Oops now you gotta hire a new one.