Mudya, D., & Yudoko, G. (2024). INCREASING OVERBURDEN PRODUCTIVITY ACHIEVEMENT BY USING LEAN SIX SIGMA FRAMEWORK: A CASE STUDY OF MINING ACTIVITY AT PT. BETA BY CONTRACTOR PT. DELTA. Jurnal Darma Agung, 32(2), 724 - 736. doi:10.46930/ojsuda.v32i2.4231