Quality engineering of crumb rubber by minimizing rework using fuzzy FMEA Khalida Syahputri, Jelly Leviza, Rahmi M Sari, T Indah Rizkya, Ikhsan Siregar and Mangara M Tambunan MATEC Web Conf., 197 (2018) 14007 Published online: 12 September 2018 DOI: 10.1051/matecconf/201819714007