[1] Bonini P, Plebani M, Ceriotti F, et al. Errors in laboratory medicine[J]. Clin Chem, 2002,48(5): 691-698. [2] Nevalainen D, Berte L, Kraft C, et al. Evaluating laboratory performance on quality indicators with the six sigma scale[ J]. Arch Pathol Lab Med,2000,124(4):516-519. [3] Westgard JO, Westgard SA. The quality of laboratory testing today: an assessment of sigma metrics for analytic quality using performance data from proficiency testing surveys and the CLIA criteria for acceptable performance[J]. Am J Clin Pathol, 2006,125(3):343-354. [4] Coskun A. Six sigma and calculated laboratory tests[J].Clin Chem, 2006, 52(4): 770-771. [5] David M ,Parry ST. The quality goal indexits use in benchruaking and improving sigma quality performance of automated analytic test[OL/S]. [2006]. http://westgard .com/guest34.html. [6] Westgard JO. Six sigma table[OL/S]. [2007]. http: //www westgard com/sixsigtable html. sixsigmatable.htm. [7] Westard JO. Six sigma basics:outcome measurement of process performance [OL/S]. [2001]. http//www.westgard.com/lesson66.htm. |