
Jidoka ◾ 139
Summary
The jidoka concept was invented by Sakichi Toyoda and developed and
extended by Shigeo Shingo. Jidoka is essential if we are to achieve our tar-
gets of best quality at lowest cost in the shortest lead time. Jidoka requires a
fundamental rethinking of quality management, away from statistical quality
control, and toward 100% inspection and poka-yoke. A poka-yoke is a sim-
ple, inexpensive, and robust tool that inspects 100% of items, detects errors
that might lead to defects, and provides quick feedback so that countermea-
sures can be taken. Team members are the best source of poka-yokes.
Poka-yokes either shut down equipme ...