8. Principle of the other
To avoid the work of different mistakes, and try to be distinguishable.
(1) Lines of the size or shape to distinguish between
Example: the income tax declaration
Will be necessary to declare people filled with the scope of the data recorded in pachytene box.
Example: Please reply of the location of torn off along the dotted line.
(2) to different colors to represent different to the meaning or content of the work
Example: Official files Red: documents on behalf of emergency
White: the representative of the normal paper
Yellow: on behalf of confidential documents
Example: in the production line will be put up for bad "red" labels
Will be put up for rehabilitation of "yellow" labels
Good will hang up the "green" labels

9. Principle warning
If there is an abnormal phenomenon occurred in a sound and light or other means shows that all kinds of "warning" signals, in order to avoid the error occurred.
Example: excessive speed of the car, the warning lights on bright.
Example: the Department of seat belts not good, warning lights on bright, or a slow the speed.
Example: operating computers, pressed the wrong button, the voice warned.

10. Easing Principle
To use various methods to reduce the error occurred after the damage caused by, although not completely rule out the error occurred, but can reduce the extent of its damage.
Example: eggs of the plenum during shipment boxes to reduce handling damage.
Example: car seat belts, ride motorcycles wear helmets.
Example: Poly-plus or cardboard products in order to reduce the handling of broke.
Example: pen on the table was always in others inadvertently removed, how do » Paste the name of or addition of the rope fixed on the table.