What do those stack lights mean?

The colour coded label ensure the operators in the area know exactly what their stack light alarms mean. This factory has no true andon system, all machines however have a stack lights indicating their status but with plenty of different colours etc. for various faults.


Ideally there should be standardization across all stack lights and failing that the above signage could be improved further by making it larger so it can be read from a distance in all directions.

Safety lock

In this example before the labeling there was just a handle with no explanation of what it was for and no one knew there was another one at the other side of the machine. A simple description solves this and helps ensure that backed up with training that the safety locks will be used in the right circumstances.