In particular in those companies which are marketing of a product, such as the Footwear Industry, the need to have a quality control department,
as we know the creation of a pair of shoes is a set of processes complex, even if different systems exist of construction, thus considerably increasing the possibilities that there is some problem along the way, either by mistake of labor damage to any of the machinery or the loss of
properties in some of the compounds used.
If such supervision exists at the end of the production line, it will be easier to detect these errors by the head of quality control or any member of his team, who are obliged to apply tests that first include a visual check and then proceed with checks of strength, bend, temperature and resistance, in all these steps the product must maintain its initial properties at 100%, otherwise it will be discarded from the production line.