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Training Within Industry

Synonym(s):  TWI

A series of training programs developed during WWII enabling U.S. companies to hire and train huge numbers of new workers to replace those who had gone to war.

TWI had three main training programs, collectively referred to as “J” programs:

  • Job Instruction taught supervisors and experienced workers how to teach people how to do work with reduced defects, less scrap and rework, fewer accidents and less tool and equipment damage.
  • Job Methods taught workers to make improvements methodically by making the best use of people, machines, and materials to produce greater quantities of quality products in less time.
  • Job Relations taught supervisors how to handle people problems effectively and fairly by gathering facts, weighing them, making a decision, taking action, and checking results.

While TWI concepts were forgotten in the U.S. amidst post-war prosperity, struggling Japanese companies, including Toyota, adopted them. In fact, TWI’s Job Instruction program is still the primary training tool used by Toyota’s team leaders worldwide. In recent years, a TWI revival movement has appeared in the U.S. and other countries.

From the Lean Lexicon 5th Edition
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