Novita Nurrry Chrisyani, Cakti Indra Gunawan, and Yuni Setyawati. β€œAn Analysis of Product Quality Control Using The Six Sigma Method at Omah Produksi Tempe Rizky Jaya, Batu City ”. International Journal of Management and Business 3, no. 1 (January 11, 2026): 227–230. Accessed May 12, 2026. https://irdhjournals.com/ijmb/article/view/816.