With the industrial revolution, manufacturers began to place operators on specialized tasks.
So rather complete a single object, they would specialize in a single process–for example, cutting, lathing, or a particular manual assembly.
By the early 20th century, all of the parts were in place for the modern car assembly line to emerge.
With the advent of interchangeable parts, electric conveyor belts, and new types of machining processes, assembly lines were poised to make the world.
