Beyond these simpler checks, two industry methods used are the Ten point and Four point systems. The most commonly used is the Four point system. Within this system, fabric rolls are graded for defects. Each defect receives a certain number of points, and after inspection, of course you hope for the lowest number of points possible. The point system is as follows:
As you can see, the more severe the defect, the more points that will be taken off. It is up to the client to set the maximum number of defects per 100 yards, which is a maximum of 30 points per 100. The inspector will add up the defects points and then use the following formula to determine the rate of points per 100 yards.
After finding the stats for the individual rolls, the client is given:
Generally, an inspection company can check 1000 yards at most during one day, so if an average roll is 50 yards, that would mean 20 rolls inspected, which is what the proportion would be out of. Inspecting fabric is quite time-intensive and requires significant expertise. In discussing with your QC agents your textile requirements, you can choose the best acceptable limit of points to ensure that you will receive a shipment of good quality.