Process and quality improvement using six sigma in construction industry. Journal of Civil Engineering and Management, [S. l.], v. 18, n. 2, p. 158–172, 2012. DOI: 10.3846/13923730.2012.657411. Disponível em: https://journals.vilniustech.lt/index.php/JCEM/article/view/4435. Acesso em: 10 may. 2025.