Tapubolon, Bornon, and Hery Irwan. “Analysis Of Pipe Welding Quality Control Using The Seven Tools Method In The Manufacturing Industry ”. International Journal of Science and Environment (IJSE) 6, no. 3 (August 6, 2026): 23–34. Accessed August 7, 2026. https://ijsenet.com/index.php/IJSE/article/view/775.