The pictures of shop signs, doorways and facades can be drawn by hand, made by computer or printed on paper. The materials of billboards are generally welded with square tubes, angle steel, etc. It can have three-dimensional plate, lamp cloth, blister, car paint, gusset plate, aluminum-plastic plate, etc

The billboard is a signal tool in the pull system to start the next production process, or to carry the WIP to the downstream process. This term means "signal" or "signal board" in Japanese.

Refers to all outdoor media that transmit advertising information. The media size depends on the actual environment.