Sorry, but there is no such animal in the RV industry. Quality control is at the mercy of who is watching the factory help, follow up with the completed RV and the weekend hangover.
Unlike the Auto industry, RV's are pumped out of the plants at a hurried pace to get them to the dealers.
I bought a brand new trailer that the shower drain was never connected and with a bent axle. Did the transporter go over a high curb and not tell anyone? Just listen to the many post of cracked frames, slide-outs that don't work and poor finishes on brand new units. I personalty entered a new 5th wheel on a sellers lot that had the inside ceiling coming down???
On the other hand, there are companies that do things a little better: Lets start with Airstream and then move on to Teton, Carriage, and Double Tree. If your buying brand new, I don't believe these companies (besides Airstream) are still in existence. But they were well made.