I was put on a Performance Improvement Plan at my last job in January. The typical unrealistic expectations and goals with no way to actually measure them. I was terminated by the end of the month. I just found out that my old boss has left the company. I'm not sure what the reasons why he actually left and I'm not about to ask, that guys dead to me. But I'm guessing it might of been about his own performance, and I was a great scapegoat at the time. So remember it may be because you're boss is incompetent and has pressure being put on them.