Learning

Training Within Industry

The U.S. wartime program that built the first-line supervisor — its history, its three "J" programs, its spread to Japan and Toyota, and an honest look at the "roots of lean" claim.

Contents · 8 sections 01

What Training Within Industry Was

A plain definition, the three "J" programs at a glance, and why a lean audience should care: TWI developed people as the way to improve production.

~7 min 02

Origins: The 1940 Manpower Crisis

A workforce expanding faster than it could be taught, the emergency service created to fix it, and the four men — the "Four Horsemen" — who built it.

Figures: The Four Horsemen

~10 min 03

The Method Behind the Method

One standardized course, the four-step card, "learn by doing," and the multiplier effect that let a tiny staff reach millions — training treated as standardized work.

Figures: The multiplier / train-the-trainer model

~10 min 04

The Three J Programs

Job Instruction, Job Relations, and Job Methods at a glance — plus Program Development and Job Safety — and how the three J's map to the five needs of a good supervisor.

Figures: The three J programs of TWI

~5 min 05

Impact in the United States

The scale — 1.75 million certificates from 16,511 plants — what TWI measured and reported, and the rapid postwar fade at home.

Figures: TWI by the numbers

~8 min 06

TWI Abroad and in Japan

How TWI outlived its U.S. wind-down — carried abroad, installed in occupied Japan, and institutionalized nationally there far more deeply than at home.

~12 min 07

TWI at Toyota

Adoption after the 1950 crisis, Ohno's measured regard for the programs, and how each J evolved: JI into Toyota Job Instruction, JM into the Kaizen course, JR into Toyota Communication Skills.

Figures: How the three programs evolved at Toyota

~13 min 08

The Roots-of-Lean Question

An honest verdict: full credit for what TWI built in supervisor development, and a clear line on what it did not originate — and where to go next.

Figures: What TWI seeded, and what it did not

~9 min