EQAS Program User Guide - QCNet

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Chapter 5: EQAS Reports3National Performance Score HistogramAn overall laboratory performance score is calculated for each participant in the cycle. All scores forlaboratories reporting in your country are grouped and a distribution of these scores is generated.The performance score is based on the overall mean Z-score, calculated across all samples andanalytes. This score is affected by late and amended results. A penalty is applied for each resultreceived late and/or amended. Amended results are more heavily penalized in the calculation of theperformance score. After all penalties are applied, an individual score is normalized based on thenumber of individual results reported by the laboratory. Laboratories submitting data before a sampleclose with no subsequent amendment after the sample close are not affected by penalties.The distribution of overall performance scores is divided into five quintiles (20% percentile groups).• The lowest performance score is shown on the left (best performance).• The highest score is shown on the on the right.• The number of laboratories contained in each quintile is shown at the top.• Your laboratory’s performance is indicated by the “Your Result” arrow.4Worldwide Performance Score HistogramThe Worldwide Performance Histogram shows all participants in the program cycle. “Your Result”shows your laboratory’s performance score compared on a worldwide basis.EQAS Program User Guide 67
Chapter 5: EQAS ReportsMethod Summary ReportThe Method Summary Report provides a summary of individual peer (instrument/reagent) and methodperformance (not laboratory performance) among participating laboratories. You can use the information in theMethod Summary Report to evaluate peer/method/instrument performance. The Method Summary Report isavailable at the end of each program cycle and is available to all registered participants on www.QCNet.com.The Method Summary Report consists of two main parts:• Coversheet• Analyte pagesMethod Summary Report: Coversheet121HeaderThis section shows the following information:• Report name• EQAS Program name and catalog number• Cycle number and cycle dates2LegendThis section provides descriptions of the abbreviations and symbols used on the Analyte pages.68 EQAS Program User Guide
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EQAS Program User Guide - QCNet

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