A thought just occurred to me as I re-read some of the initial posts regarding the production lines and having one paint line.
IF that is true (which seems off because there would be no redundancy if something goes down), that actually helps further explain why they've reduced things like color choices, chrome vs painted bumpers, etc..).
Most production lines don't build 10 different trim levels at the same time and they won't paint 5 different colors in one shift because it's faster and cheaper to produce a batch of the same thing.
So on Monday they may schedule to build 2500s and 3500 SRW Tradesman (or BigHorns, Laramies, etc...) diesels in blue. Tomorrow, they may be building 2500 Hemi Limiteds in Metallic Gray. So on and so forth.
Having production personnel stop before each build begins to verify that the pickers sent them the right components (which harness the truck gets, which control modules, which seats, which engine, which transmission, which suspension, verify paint color, etc)... costs time. Production lines have a quota to reach each day. The name of the game is maximum throughput. If they don't produce x number of trucks per day, the overhead costs creep up.