THE APPLICATION OF THE SIX SIGMA METHOD IN REDUCING QUALITY FAILURE COSTS A CASE STUDY IN A DIWANIYAH TEXTILE FACTORY. American Journal of Research in Humanities and Social Sciences, [S. l.], v. 12, p. 76–103, 2023. Disponível em: https://americanjournal.org/index.php/ajrhss/article/view/865. Acesso em: 2 feb. 2026.