Just don't do it. I work with a guy who's been at Dell for 30 years and he said this is a first. His opinion was that they (Execs) know the TD results have been DOG do----o - but alter numbers when they present them, of course! - and are in panic mode because now "they" are wondering why? So, they come out with a new TD for us to report on JUST managerial performance.
Which is funny because if I had missed that email, I'd never know about it. Not a SINGLE manager, or director has mentioned this in any of our meetings or 1x1's.