Sukwadi, R., Harijanto , L., Inderawati, M. W. ., & Huang, P. T. B. (2021). Reduction in Rejection Rate of Soy Sauce Packaging via Six Sigma. Jurnal Teknik Industri, 22(1), 57–70. https://doi.org/10.22219/JTIUMM.Vol22.No1.57-70