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