Kusrini, Elisa, Fathia Nisa, and Vembri Noor Helia. “Lean Service Approach for Consulting Services Company”. International Journal of Integrated Engineering 11, no. 5 (September 9, 2019): 189–195. Accessed August 7, 2026. https://journal.uthm.edu.my/index.php/ijie/article/view/4218.