The small-step work improvement approach was developed in the USA under Training Within Industry program (TWI Job Methods). Instead of encouraging large, radical changes to achieve desired goals, these methods recommended that organizations introduce small improvements, preferably ones that could be implemented on the same day. The major reason was that during WWII there was neither time nor resources for large and innovative changes in the production of war equipment. The essence of the approach came down to improving the use of the existing workforce and technologies.