There are many ways to boost quality. Since there isn't the economy of scale auto makers have where having everything done by robot helps, the entire RV assembly has to be done my hand, but we have had companies and quality controls for a long time. Best way, have one round of work done, have it inspected and fixed by a different group, once it passes muster, do the second round, repeat. Have everyone on salary so the focus is not getting it done fast, but done well, especially if bonuses were given if warranty claims and sales were up to par.
I read about so many innovative things coming from RV parts makers... it would be nice to see those, be it cutting edge stuff, or just Seitz windows which are better than the common RV stuff we have in the US because they are double-paned.