Companies have changed the ways they do evaluation for employees especially large ones like IBM and Bank of America where I have worked in the past. Say there are 12 people in your group, high upper management says pay raise are given to only to those are rated 1, 2, 3, 4 and those who are 5 are put on a six month probation period no raises.
The people who are rated 1 get this highest amount/percentage of the annual dept raises, 2s get the next amount/percentage, 3, the next, etc. Oh by the way your manager is told oh by the way you can only have maybe 2 1 performers, or maybe just 1 1 performer, so many 2, the rest can be 3 or 4.
The company I work at is not a large company but it uses the model I stated above.
You can bust your butt and unless you brown nose your manager the chances you are a 1 performer are very slim.
True story. When I worked at IBM they had a saying, the only qualification you need to be rated a 1 performer was that you had to be able to walk on water.
In my 15 years there I was rated a 1 performer only once, as a tech support person I average taking 100 calls a day. I got so good at my job supporting the AS400, S36 and S38 operating systems that I knew in the first 15 seconds as soon as the customer started to tell me their problem I knew the solution they needed.