a line stop; typically a cord that a worker can pull to stop the assembly line when he or she detects a defect; an example of jidoka
a system of flashing lights used to indicate production status in one or more work centers; the number of lights and their possible colors can vary, even by work center within a plant; however, the traditional colors and their meanings are
A line indicator light or board hung above the production line to act as a visual control Andons are used to visually signal an abnormal situation
Indicator above production line to signal abnormal conditions Often uses green/yellow/red to indicate severity; see "Visual OEE"