Saragih, Johnson, Iveline Anne Marie, and Amelia Diza Mubarani. “Increasing Production Performance With The Use of Lean Six Sigma Methodology In a Filing Cabinet Company”. Journal of Modern Manufacturing Systems and Technology 5, no. 2 (September 3, 2021): 106–119. Accessed June 8, 2025. https://journal.ump.edu.my/jmmst/article/view/6508.