Sofiana, Arelia, and Ekra Sanggala. “Meminimalisirkan Gagal Antar Di Kantor Pos Mojokerto Dengan Metode DMAIC”. Jurnal Media Teknik dan Sistem Industri 5, no. 1 (April 2, 2021): 1–8. Accessed March 28, 2026. https://jurnal.unsur.ac.id/index.php/jmtsi/article/view/1209.