Hate to say this, but our PBS isn't not only working because of the shortage of crews. It ain't working (for 75% of people) because there is MASS manual intervention and it's not pure PBS. Only the very top (top 50 or so) are being taken care of on PBS - even though this month and last hasn't been too kind to them either (so I hear). For everyone else, PBS doesn't make one bit of difference. I think for one to think that the 'PBS' actually has an effect on our work life is just being delusional.
By the way, we are short of crews too...... Big time.