Alyamoor, Ali. “Reduce the Cost of Poor Quality Using the Six Sigma Approach in the Face of Defects: A Case Study in Children Wear Factory in Mosul”. TANMIYAT AL-RAFIDAIN 32, no. 100 (September 1, 2010): 254–274. Accessed September 8, 2025. https://tanmiyat.uomosul.edu.iq/index.php/tanmiyat/article/view/29519.