Short answers, pulled from the story.
French General Jean Baptiste Vaquette de Gribeauval proposed that muskets could be built faster if their parts were identical. He funded Honoré Blanc to test this idea, but Blanc never fully succeeded in making interchangeable components work on a large scale.
Captain John H. Hall achieved full part interchangeability at Harper's Ferry around 1822. Historian David A. Hounshell credits Hall with solving the problem during that year while working at the facility.
Simeon North manufactured guns for the US Army and developed a crucial milling machine in 1816. His work connected directly with Connecticut clockmakers who used interchangeable parts before 1860.
David Wilkinson received a $10,000 award from the United States government for his slide rest lathe invention. Other essential tools included screw cutting lathes, turret lathes, milling machines, and metal planers.
Henry Ford began mass producing cars using true interchangeability on assembly lines in 1913 at his plant. The Ford plant produced standard model cars using this method to make automobiles affordable for the middle class across America.