Who introduced assembly-line production?

Henry Ford did not invent assembly-line production.

Ransom E. Olds, father of the Oldsmobile, introduced the assembly-line technique to the United States in 1901.

In doing so, he increased automobile production from 425 vehicles in 1901 to over 2,500 in 1902.

Ford contributed modifications, including the conveyor belt system, which reduced the time it took to build a Model T from 1.5 days to 90 minutes.