The small-step work improvement approach was developed in the USA under Training Within Industry program ( TWI Job Methods ).
2.
They developed a structured approach based on a framework from the US World War II " Training within Industry " ( TWI ) program, called ECRS Eliminate, Combine, Rearrange, and Simplify.
3.
The Economic and Scientific Section ( ESS ) group was also tasked with improving Japanese management skills and Edgar McVoy was instrumental in bringing Lowell Mellen to Japan to properly install the Training Within Industry ( TWI ) programs in 1951.
4.
Three stories of its origin have been found, one that they studied just-in-time distribution system, one that they followed the writings of W . Edwards Deming, and one that they were given the principles from a WWII US government training program ( Training Within Industry ).
5.
In the Foreword to Dinero's book " Training Within Industry ", John Shook relates a story in which a Toyota trainer brought out an old copy of a TWI service manual to prove to him that American workers at NUMMI could be taught using the " Japanese " methods used at Toyota.