“Efficiency Analysis of Underframe Component Installation Process in the KCI Retrofit Electric Multiple Unit (EMU) Project at PT Xxx Using a Lean Manufacturing Approach: Analisis Efisiensi Proses Pemasangan Komponen Underframe Pada Proyek KRL KCI Retrofit Di PT Xxx Dengan Pendekatan Lean Manufacturing”. Procedia of Engineering and Life Science, vol. 10, no. 1, Nov. 2026, pp. 1289-97, https://doi.org/10.21070/44edbd30.