“Analisis Efisiensi Operasi Boiler Berdasarkan Produksi Fly Ash dan Bottom Ash Menggunakan Metode Data Envelopment Analysis Di PT. XYZ”. 2026. Journal of Industrial Innovation and Safety Engineering (JINSENG) 3 (`1): 28-37. https://doi.org/10.35718/jinseng.v3i`1.8481975.