As a guide to understanding and applying the Toyota production system, the author has defined 24 important terms.
Andon, the line-stop indicator board hung above the production line, is a visual control. The trouble indicator light works as follows:
When operations are normal, the green light is on. When a worker wants to adjust something on the line and calls for help, he turns on a yellow light. If a line stop is needed to rectify a problem, the red light is turned on. To thoroughly eliminate abnormalities, workers should not be afraid to stop the line.