Wulandari, R. A., Prastawa, H. . and Budiawan, W. . (2024) “Quality Improvement of The Public Service of The Metal Contamination Testing Laboratory Using Lean Six Sigma Approach (Case Study)”, Formosa Journal of Science and Technology , 3(4), pp. 861–880. doi: 10.55927/fjst.v3i4.9205.