Pang, J.H.; Zhao, H.; Qin, F.F.; Xue, X.B.; Yuan, K.Y. (2019). A new approach for product quality prediction of complex equipment by grey system theory: A case study of cutting tools for CNC machine tool, Advances in Production Engineering & Management, Vol. 14, No. 4, 461-471, https://doi.org/10.14743/apem2019.4.341