As a quick aside, before working at GM, I worked at Johnson Controls where we assembled the seats for the S-10/hombre. We once shut down the GM assembly line for over an hour accidentally from a simple flat tire on a truck delivering our seats across town to the GM plant. Imagine all the things that can go wrong if the supplier is across the country!
the RV manufacturing industry works off of a "just in time" supply line model ....with most of the suppliers located in the Indiana area, it makes things a bit easier .... winter weather can and does play heck with the process but all in all, it works well .... they have operated in this manner for so long that the kinks have been pretty well worked out