Development of a New Fabric Grading System with a Demerit Control Chart in the Apparel Industry

Fabric defects are usually manually identified by quality control staff in the apparel industry. Control charts are an appropriate tool to achieve this goal. In this study, knitted fabric often used in an apparel factory were used in both the detection and classification process. The systematic classification of fabric defects such as critical, major, and minor types was achieved. Then, by calculating the D scores of fabric types, the types of errors out of the lower and upper control limits were determined. According to the results of the experiment, it was shown that the fabric grading process can be performed with demerit control charts