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THE moving assembly line was the simplest of inventions, born of necessity to meet the exploding demand for automobiles in America in the early 20th century.

And while it turned 100 years old this month, “the line” remains as integral to the progress of the auto industry as it was in the days of Henry Ford.

The assembly line is a constantly evolving industrial ballet of workers and robots building cars. And automakers like the Ford Motor Company are finding that building multiple models on the same line is a huge key to success in the intensely competitive global marketplace.

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– http://www.nytimes.com/2013/10/30/automobiles/100-years-down-the-line.html?pagewanted=1&ref=todayspaper