It’s whatever HR decides. From my experience there is no justifiable rhyme or reason.
I once had a minority female HR rep who gave minorities and women higher raises than white males. When I complained and asked for an explaination, I was told I would be investigated for knowing others salaries and she could not explain what factors were used to make the determination.
I asked if it was education, experience, and performance. She just shook her head and said those factors did not factor into percentage wage increases. I just figured it was her way of dispensing social justice and moved on.
It s—s when someone who has less education, experience, and has been on multiple final written warnings gets a larger percent base pay increase.
But that’s vzw retail. You are either in or you are out.