INTRODUCTIONSigma metrics methodology is a process‐based quality management and improvement program developed by Motorola in the early 1980s, which soon became famous and was used by other manufacturers and continues to be used today to drive quality improvements and standards. In the 21st century, sigma metrics were introduced into clinical laboratories by David Nevalainen and Lucia Berta. Quality performance can be assessed by sigma value, where 3 sigma is the minimum performance, and 6 sigma is the world‐class quality, such that 99.99966% of results are error free, corresponding to 3.4 defects per million opportunities.In many Chinese clinical laboratories, the Westgard multiplication rules (13s, 22s, R4s, 41s, 10x) have been widely used in clinical chemistry. In this method, there may be more false rejection, waste of quality control materials and prolonged test awaiting time (TAT), whereas the sigma metrics approach allows a laboratory to take a broader view of the data, joining estimates of bias and imprecision into a practical judgment on the clinical usefulness of the method's quality control criteria. Thus, it is useful and simple to access and choose optimal internal quality control criteria based on sigma metrics.The objective of this study is to evaluate the performances of
Journal of Clinical Laboratory Analysis – Wiley
Published: Jan 1, 2018
Keywords: ; ;
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