UNTUNG FADEL IBRAHIM (2023) USULAN PERBAIKAN MAINTENANCE MESIN LAS PIPA BERDASARKAN PERHITUNGAN METODE OVERALL EQUIPMENT EFFECTIVENESS (OEE) DAN PREVENTIVE MAINTENANCE POLICY (Studi Kasus PT.Raja Besi, Kota Semarang). S1 thesis, Universitas Trunojoyo Madura.