Isnt this basically every employee rating scale for their yearly evals?

Most ive seen are usually something like "below/meets/exceeds expectations" and 85% of the company gets meets. Theyre the 0 and a lot of meets are very good employees. Then you have those who basically do 2 peoples jobs in half the time. They Just get it, and the get shit done even if it wasn't their job. Then there's those -1 who need so much help they bring down those around them or take so much attention others cant complete their work