It's pointless. People will just do the things that give them the best score, at the expense of the other jobs.
Back on helldesk, years ago we had to do at least 20 tickets a day. I'd pick the oldest one as per the rules where as a colleague picked all the 5 minute jobs and took the afternoon off. Just doesn't work and definitely doesn't show actual productivity. Oh and that guy ended up being the SD manager....
Biting the hand that feeds IT
