![]() On the x-axis, the date/times (or the number of the control run) are plotted. Indicated by a wider distribution of values above and below the mean Indicated by a tight group of values above and below the mean Questions to consider when examining control data:Īre the same number of values above and below the mean? High standard deviation/ high imprecisionĪ method may be precise in that repeat measurements are nearly the same, but if the repeat measurements are not the true value, they will be inaccurate. Repeatedly of a test is inconsistent 9 due to chemicals involved or malfunction) 22s when 2 consecutive control values are on the same side of the mean and > +2SD.(reject)Ĥ.41s // >+1 or mean - 1 SD limits (reject) 13s when one control value > ± 3SD (reject)ģ. Used to express how far apart numerical values are from each otherĪn acceptable limit for control data is ☒SD (warning)Ģ. Statistics that quantifies how close numerical values (i.e, QC values) are in relation to each other. What is Standard Deviation (aka precision)? Levels at which a physician may implement or adjust medications or take other actions It is designed to recognize and minimize analytical errors in specific procedures to prevent reporting erroneous patient results. One component of the quality assurance process and involves the analytical phase. Begins before the sample is collected and ends with the result being seen, interpreted and acted upon by the physician Labops8 Week 8: Quality Assurance and Quality Control: Part I Questionġ.is an overall system of checks and balances.Ģ.All actions. ![]()
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