How can CNC machining beginners reduce the scrap rate? What are the first few things experienced shop floor technicians check?

When training newcomers in machining, what I fear most isn't their slow pace, but their rush to chase production numbers before they've even understood the blueprints and tool offsets. If the first piece isn't stable, everything that follows feels like gambling. Personally, I focus on three things: whether the dimension chain has been identified, whether tool wear is recorded by batch, and…