What concept drastically changed the way that Henry Ford produced Model T automobiles?

The concept that drastically changed the way Henry Ford produced Model T automobiles was the assembly line. By implementing this system, Ford was able to streamline the manufacturing process, allowing for faster production and reduced costs. The assembly line allowed workers to specialize in specific tasks, significantly increasing efficiency and enabling the mass production of cars at an unprecedented scale. This innovation not only revolutionized automobile manufacturing but also influenced various other industries.