Rakay Edhiargo Toyosito, Mochamad Eko Nugroho, and Refo Aditya. “Implementation of the DMAIC (Define, Measure, Analyze, Improve, Control), FTA (Fault Tree Analysis), and Poka-Yoke (Error-Proofing) Methods to Reduce Codification Defects in Gift Box Packaging at PT ASD”. Jurnal Ilmiah Multidisiplin Indonesia (JIM-ID), vol. 5, no. 09, Sept. 2026, pp. 2348-63, https://ejournal.seaninstitute.or.id/index.php/esaprom/article/view/8908.