Think at the operators in the warehouse who make thousands of pickings, perhaps of similar products or references. It is difficult to always find the right product and in the case of very crowded trays and similar items it takes more time to find the right product on which to pick.
This is why the visual aids were conceived that help speed up the picking and deposit operations because they provide a clear visual indication of the position of the requested item. The operator, guided in the location of the items, greatly reduces his possible errors and also receives numerical or textual information on the quantities to be picked.
Time optimization is very important for companies and through the use of these devices, picking operations can be doubled, as well as making them simple and efficient.