X is a concept makes an act of error impossible to occur, by ensuring a right place for everything. The concept was formalized & adopted, by Shigeo Shingo as part of the Toyota Production System.
Today the concept is widely used in manufacturing, consumer electronics design, safety & many other fields.
Which concept am I talking about?
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Poka Yoke
Shingo recognized three types of poka-yoke for detecting and preventing errors in a mass production system:
1. The contact method identifies product defects by testing the product's shape, size, color, or other physical attributes.
2. The fixed-value (or constant number) method alerts the operator if a certain number of movements are not made.
3. The motion-step (or sequence) method determines whether the prescribed steps of the process have been followed.
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