The concept of mass production depends on the use of interchangeable parts. One of the most famous inventors to use interchangeable parts, mass production and the assembly line was Henry Ford. Unlike other cars of the time, his Ford Model T used the same identical parts in each vehicle. Parts were created in large quantities and delivered to his assembly plant where workers built the cars on an assembly line. This allowed Ford to produce a quality vehicle ready to go in just 93 minutes. Ford raised workers' wages in 1914 to $5 a day. That was an excellent wage at the time, so much so that it allowed many of his workers to buy their own Model T. That same year Ford produced more cars than all other car manufacturers combined. His least expensive model in 1914, the Runabout, sold for $440. By 1925 he was able to sell a Model T for as little as $260.