[1]
D. M. H. Fathurohman, H. H. Purba, and A. Trimarjoko, “Value Stream Mapping and Six Sigma Methods to Improve Service Quality at Automotive Services in indonesia”, Oper. Res. Eng. Sci. Theor. Appl., vol. 4, no. 2, pp. 36-54, Jun. 2021.