A problem that stays hidden usually becomes a bigger problem.
That is why Andon is such an important part of the Toyota Production System.
Andon makes abnormalities visible immediately so the right people can respond before defects, delays, or safety issues spread further through the process.
In practice, Andon helps teams to:
• Recognize abnormal conditions quickly
• Signal when support is needed
• Respond directly at the problem location
• Stop the process when necessary
• Protect downstream quality
• Investigate root causes
• Track repeated issues for improvement
The real value of Andon is not simply the light, cord, or signal.
It is the management response behind it — see the problem, support the team, solve the cause, and prevent recurrence.
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