“PENGURANGAN NON VALUE ADDED ACTIVITIES MENGGUNAKAN METODE LEAN SIX SIGMA: Elly Wuryaningtyas Yunitasari Program Studi Teknik Industri Fakultas Teknik Universitas Sarjanawiyata Tamansiswa, Yogyakarta, DIY, Indonesia”, EJD, vol. 11, no. 2, pp. 15–25, Sep. 2018, Accessed: Jan. 19, 2026. [Online]. Available: https://jurnal.ummu.ac.id/index.php/dintek/article/view/133