PENGENDALIAN PROSES BAJA KARBON TINGGI DI PABRIK BILLET BAJA PT KRAKATAU STEEL (PERSERO) Tbk, CILEGON HIGH CARBON STEEL PROCESS CONTROL IN BILLET STEEL PLANT OF PT KRAKATAU STEEL (PERSERO) TBK, CILEGON - Pertiwi, Riska Asri (Departemen Statistika IPB, 2013)