Originally Posted by Unregistered

C is default, B is good. C+ is something in between - it also means bosses fought for you because its easier to just give a C.

Depending on Performance Grades, merit increments are typically between 3-5%. Performance bonus wise for grade 11, I can't recall off hand but a C is 2 months, B is 3 months. So C+ will be somewhere in between.

Hope this helps.