Suwandi, Nadia Natalia, and Kartika Suhada. “Penerapan Lean Manufacturing Dengan Metode Value Stream Mapping Untuk Mengurangi Cycle Time Pada Bagian Perakitan Spring Mattress Di PT X”. Journal of Integrated System 7, no. 2 (January 1, 2025): 111–133. Accessed January 15, 2025. http://114.7.153.31/index.php/jis/article/view/8694.