Muhammad Naufal Daffa Satria, NIM.: 22106060068 (2026) OPTIMASI RELIABILITY-BASED PREVENTIVE MAINTENANCE GLAND PACKING SOOT BLOWER DENGAN MIXED INTEGER NONLINEAR PROGRAMMING (MINLP) (STUDI KASUS: PT PAITON OPERATION & MAINTENANCE INDONESIA UNIT 3). Skripsi thesis, UIN SUNAN KALIJAGA YOGYAKARTA.