Everyday for the last 2 months I've worked on our 400 belt. We have a rookie supervisor and everyday he gives me a documented talk with regarding my pph. He wrote me up for a 222 pph when our goal is 225. He also wrote me up because my boots are starting to show wear. I write all hin #s and put packages in stop order I don't stack out and rarely have misloads I make sure I cover all the things I can get fired for. My father is a union steward he advised me to file a grievance however he is a driver and doesn't know much of our guidelines. If I decide to file a grievance what articles can I write as violations.