F. Achmad, M. Yustiana Lubis, and Y. Nugrahaini, “Proposed Design of Sewing Process Improvement to Minimize Polyester Technical Sportswear Product Defect at PT. X Based on The DMAIC Method Approach”, j.sist.teknik.industri., vol. 25, no. 1, pp. 25-40, Jan. 2023.