Nursyahbani, Zahra, Theodora Edita Sari, and Winarno Winarno. 2023. “Proposed Reduction of Piston Cup Forging Defects Using Fishbone Diagrams, FMEA and 5W+1H in Vehicle Spare-Parts Companies”. Go-Integratif : Jurnal Teknik Sistem Dan Industri 4 (01):22-32. https://doi.org/10.35261/gijtsi.v4i01.8703.