Okay, are we talking about "boards sold as 2x10s might vary in width from board to board?" Because I took you to mean that a given dried and milled 2x10 might move up to an inch, which it had better fucking not. Because yeah, the likes of Georgia Pacific are going to be a bit sloppy with the final dimensions of 2x10s, because it rarely matters that much for what that board is going to be used for.
I'm a woodworker, I buy rough sawn lumber dried over a period of months, I shop dry it for a couple weeks then mill it myself. I can predict with a fair degree of accuracy how much it will move.
A sawyer is an occupational term for a person who operates a sawmill. My sawyer's name is Bill.