Lê Chính, Nguyễn Khắc Hiếu, Hoàng Đức Sinh. Case Study Applying Six Sigma to Reduce Defects of DC Recessed LED Downlight. JTE [Internet]. 2026 Aug. 28 [cited 2026 Sep. 10];21(03(V):35-4. Available from: https://jte.edu.vn/index.php/jte/article/view/2105