MUDYA, Dinda Ratna; 						YUDOKO, Gatot.
 INCREASING OVERBURDEN PRODUCTIVITY ACHIEVEMENT BY USING LEAN SIX SIGMA FRAMEWORK: A CASE STUDY OF MINING ACTIVITY AT PT. BETA BY CONTRACTOR PT. DELTA.
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Available at: &lt;<a href="https://jurnal.universitasdarmaagung.ac.id/jurnaluda/article/view/4231" target="_new">https://jurnal.universitasdarmaagung.ac.id/jurnaluda/article/view/4231</a>&gt;. Date accessed: 21 oct. 2026.
doi: <a href="http://dx.doi.org/10.46930/ojsuda.v32i2.4231">http://dx.doi.org/10.46930/ojsuda.v32i2.4231</a>.