Xiuzhi Guo, Tianjiao Zhang, Xuehui Gao, Pengchang Li, Tingting You, Qiong Wu, Jie Wu, Fang Zhao, Liangyu Xia, Ermu Xu, Ling Qiu, Xinqi Cheng
Original Papers: Special issue on Six Sigma metrics, Volume 28, June, Issue 2
KEYWORDS: Six Sigma; proficiency testing; internal quality control; allowable total error
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