Ford and the Birth of the Model T

>This meant Ford could purchase parts and materials in large quantities at better prices and schedule regular deliveries, ensuring a steady, reliable delivery of material, which allowed it to maintain just a 10-day supply of parts on hand.

And I thought it was Toyota which pioneered the 'just in time' method.

Toyota combined a lot of what was done elsewhere. They also did just as time as a goal not just a response to other constraints.