Production of the car.

Henry Ford
https://en.wikipedia.org/wiki/Car#/media/File:Henry_ford_1919.jpg

The large-scale production-line manufacturing of affordable cars was made by Ransom Olds in 1902  and based upon the assembly line technique. The assembly line style of mass production had been used in the America by Thomas Blanchard in 1821 ^.This concept was greatly expanded by Henry Ford, beginning in 1914. As a result, Ford's cars came off the assembly line in fifteen-minute intervals, much faster than previous methods, increasing the rate of cars being made while using less manpower (from 12.5 to 1 hour 33 minutes). It was so successful but painting the cars was a problem. Only Black would dry fast enough, forcing the company to drop the variety of colours available until fast-drying paint was developed in 1926.Ford's complex safety procedures, especially assigning each worker to a specific location instead of allowing them to roam about, dramatically reduced the rate of injury. The combination of high wages and high efficiency  was copied by most major industries. The assembly line forced workers to work at a certain pace with very repetitive motions which led to more output per worker while other countries were using less productive methods. In 1914, an assembly line worker could buy a Model T with four months' pay.

(Credit: Wikipedia)