The process of car design

I would love to hear a dev talk about every step planned for car design in this game, starting with the blank piece of paper in the factory design department, to having the first sale on the showroom floor.
What steps do you want to see in that chain of events, in an ideal world at least? (I understand that everything is subject to change)
What steps do you want to see in that chain of events, in an ideal world at least? (I understand that everything is subject to change)