It is a rare phenomenon in HR to see a performance evaluation from a manager that even meets our expectations let alone exceeds them. Here are a sampling of a few common mistakes I see on the regular:

1. The manager uses the annual performance review to rake an employee over the coals for his or her entire prior year’s performance. It is NOT okay to use the annual performance review to tell the employee they’ve sucked all year. As a manager, why would you endure that? Think of all of the lost productivity and pissed off coworkers. If you wait a year to tell someone they’ve not performed to your expectations, guess what, it’s not their fault, its yours for not having the spine to confront it sooner.
2. Failure to clearly communicate expectations and objectives of the position. Granted, this discussion should be happening within the first week of a new hire’s onboarding with the company and should also be reiterated during ongoing performance discussions. This exact thing is the reason you see employee’s rating themselves as exceeds expectations, while the manager is left scratching his head wondering how the hell his employee could lack such self-awareness. In the absence of this information, an employee will always default to what they believe are the expectations and objectives and perform accordingly. Duh.
3. Failure to keep any documentation from the review period to look back to. And thus rely on memory. An HR professional can always tell by a manager’s vague and sweeping statements in a performance review that he or she has no fucking clue what his or her employee accomplished all year. You know what also gets forgotten when only memory is relied upon? An employees’ weaknesses, fails,  and areas of opportunity. Fast forward to 3 months later when Mr. Manager is in HR’s office  complaining about his employee’s performance issues. HR pulls the performance review and lo and behold nothing has been indicated on the evaluation, but Mr. Manager insists this has been happening for months or years. Sorry, Mr. Manager, your documentation does not back up your accusation. Discipline and termination are going to be pretty difficult to justify.
4. Never awarding an employee anything other than a “Meets Expectations” although his of her performance clearly goes above and beyond. This is a great way to actively disengage your employee, reduce his or her productivity and send your employee to the next job offer that is extended. If your employee is killin’ it at work- give them the props they deserve. An “Exceeds Expectations” should never be elusive but it should be reserved for the rare but deserving “A”-game employees.

But to the HR folk who see the above on a routine basis, I would ask what they are doing in their respective organizations to fix it. Rampant crap reviews are more indicative of poor training and unclear managerial expectations than they are any single manager’s fault. HR- get your shit together, and start whipping those managers into performance review ninjas.