Julianto IW, Hana Catur Wahyuni. Efforts To Reduce Downgrade Of Steel Pipes In The Production Process Using The HEART Method: Upaya Mengurangi Downgrade Pipa Baja Pada Proses Produksi Menggunakan Metode HEART. PELS [Internet]. 2021 Jul. 14 [cited 2025 Jul. 2];1(2). Available from: https://pels.umsida.ac.id/index.php/PELS/article/view/1017