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”, esaprom, vol. 5, no. 09, pp. 2348–2363, Sep. 2026.