Error incompatibility product of demand in the process of sell orders, it is often the case. But this would be disastrous to the company itself if often occur and cause the same. One of the main causes of the occurrence of nonconforming product is excess stock that is in store as well as in production.
As an example of product which has a resistor the same shape and size in different specifications. Visually similar circumstances and conditions are only differentiated by the writings of the label. It requires precision to determine which products will be shipped to the customer.