Wu, Thomas, and Bayu Adzikri Ramadhan. “Analisis Efisiensi Biaya Bahan Baku Semen OPC Menggunakan Metode Material Requirement Planning Lot for Lot (MRP-LFL) Dan Just in Time (JIT) Pada PT ABC”. Blend Sains Jurnal Teknik, vol. 5, no. 1, July 2026, pp. 299-06, doi:10.56211/blendsains.v5i1.1713.