Japanese manufacturers re-building after the
World War 2 had a difficult time. for one, they had a
limited amount of people, a limited amount of raw material and
money. These problems, born out of
necessity led to the development of lean
manufacturing practices, which they called on
just in time manufacturing.
Japanese
manufacturing leaders like the Toyota Motor
Company's Eiji Toyoda, Taiichi Ohno, and Shingeo
Shingo developed a smart disciplined and
process focused production system now known as
the Toyota Production System, or lean
production. Which incorporated The Ford
production, Statistical Process Control and
other techniques into a system that minimized
the expenditure of resources that added no value
to the product.

In 1990 James Womack wrote a book called "The
Machine That Changed The World". Womack's book
was a straightforward account of the history of
automobile manufacturing combined with a study
of Japanese, American, and European automotive
assembly plants. The "lean manufacturing"
theory was made popular in American factories in
large part by the Massachusetts Institute of
Technology study of the process from mass
production toward production as written and
described in Womack's book.
A new phrase was
coined, as to which is now commonly referred to
as "Lean Manufacturing."
Earlier attempts for lean manufacturing can be traced to Eli Whitney and Henry Ford in an attempt to improve output and reduce costs.