MUHAMMAD FARREL APTA FEDORA. IMPROVING QUALITY IN ATM CARD PRODUCTION AT PT. DEF USING SIX SIGMA METHODOLOGY. International Journal of Economic, Business, Accounting, Agriculture Management and Sharia Administration (IJEBAS), [S. l.], v. 4, n. 6, p. 1847–1855, 2025. DOI: 10.54443/ijebas.v4i6.2263. Disponível em: https://radjapublika.com/index.php/IJEBAS/article/view/2263. Acesso em: 31 jan. 2025.