D. SREENIVAS RAO3, R. N. P. L. Systematic Quality Improvement on a Piston Machining Line Using DOE and Test for Variance. International Journal of Engineering Technology and Computer Research, [S. l.], v. 3, n. 4, 2015. Disponível em: https://www.ijetcr.org/index.php/ijetcr/article/view/240. Acesso em: 19 aug. 2026.