PT.X is one of the paper producers located in East Java. Currently, the goods quality produced by PT.X are decrease. This is shown from defect rate from 13.60% in 2016 to 15.75% in 2017. To reduce the current problem at company, conducted research using six sigma method. Implementation of Six Sigma is done through the DMAIC stage. The results of the defect identification show that dusting is the most dominant defect, so it is prioritized in the improvement. The result of the improvement shows the increase of sigma level from 2.55 to 2.67. The increased sigma level impact on cost saving value equal to IDR. 1,438,212,308/year.

Keywords : Six sigma, quality improvement, cost saving.