Prodution Order and logic

the order of production is not good.
the axels don’t go trough paint
in the beginning there need to be 2 separate lines:
line 1:(Bodyframe Bottom, sides, top)- fit roof -fit all panels-paint
line 2: Undercarrige - axels - suspension- brakes - engine - transmission

than the so called wedding takes place where body and the complete undercarrige come together
where line 1 and 2 come together.
like in this video;

also with the wheel assembly in the game :fit wheel, fit tires , fit brakes
firts you fit brakes then the wheels
but first you need to fit the tires on the wheels

i would like to see more logic to the real world in this game.