In 95% of companies PIPs are there as a required step before during someone with no chance that the person can save their job. Hell, I'd bet that a good chunk of companies push them out before the 30 days by ensuring that something bad happens (mystery IT outage, paperwork not filled out properly, etc). I've never seen a person in tech be put on a PIP. They're typically fired, laid off at the first chance or sometimes will wait until the contract is up. Really, if you need to be put on a PIP, you've already made a poor impression on your manager and it would take a miracle to change that impression