id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
ajlm-1344	van Heerden, Marli; George, Jaya A.; Khoza, Siyabonga	The application of sigma metrics in the laboratory to assess quality control processes in South Africa	2022		.htm	text/html	4945	278	47	Westgard found that the assumption that bias should be ‘corrected or eliminated’ was invalid for many analytes as bias still exists despite attempts at standardisation.25,26 To address the variability of sigma performance between different QC levels, months and analysers, the average sigma or lowest sigma metric could be used for determining QC procedures.27 Westgard multirules28 will be easy to implement for well-performing analytes such as PSA and DBIL. The application of sigma metrics in the laboratory to assess quality control processes in South Africa.	cache/ajlm-1344.htm	txt/ajlm-1344.txt