Improvement of Production Quality by using Six Sigma Technique: Applied Study in the Medical Syringes Factory – Babylon. Tikrit Journal of Engineering Sciences, [S. l.], v. 19, n. 4, p. 12–23, 2012. DOI: 10.25130/tjes.19.4.08. Disponível em: https://tj-es.com/ojs/index.php/tjes/article/view/478.. Acesso em: 9 sep. 2026.