KHAFI PUDDIN; MARITO RITONGA; VIORY SALSABILA; INTAN JAMILAH; DIAN KARTIKA SARI; REFI ADIYAKSA HARAHAP; AULIA BENING. Analisis Hambatan Produksi dan Efektivitas Sistem Pemeliharaan Preventive Maintenance Pabrik PT. Nippon Indosari Corpindo Medan. OPTIMAL Jurnal Ekonomi dan Manajemen, [S. l.], v. 6, n. 1, p. 87–102, 2025. DOI: 10.55606/optimal.v6i1.9056. Disponível em: https://researchhub.id/index.php/optimal/article/view/9056. Acesso em: 25 jan. 2026.