Four Point System

Four point system is very popular in textile industry for quality control. The process is given below:-

Table

Size of defect	Penalty
3 inches or less	1 points
over 3 but not over 6	2 points
Over 6 but nor over 9	3 points
Over 9 inches	4 points

Acceptance calculation:

   Total point per 100 square yards

=  (Actual Point count*36*100)/(actual Roll length*actual width)

= Points/100 square yards. 

Classification of Inspection Fabric:

< 40 points      = A

41-60 points    = B

61-80 points    = C

80 above         = Reject. 

Acceptance:

                      Generally any piece of fabric with 40 points or less faults per 100sq. yard is allowed to pass however for a roll, the average value should not exceed 18point per 100sq.yard.More than 40points faults per 100sq yard is recorded as “REJECT”