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Mistaken assumptions drive new Six Sigma model off the road.
Westgard S, Bayat H, Westgard JO.
Biochem Med (Zagreb). 2019 Feb 15;29(1):010903. doi: 10.11613/BM.2019.010903. Epub 2018 Dec 15.
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Preface.
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Quality management in European screening laboratories in blood establishments: A view of current approaches and trends.
Pereira P, Westgard JO, Encarnação P, Seghatchian J, de Sousa G.
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Evaluation of the measurement uncertainty in screening immunoassays in blood establishments: computation of diagnostic accuracy models.
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Quality control (QC) clinic. Preface.
Westgard JO, Westgard S.
Clin Lab Med. 2013 Mar;33(1):xi-xii. doi: 10.1016/j.cll.2012.11.010. Epub 2012 Dec 20. No abstract available.
Statistical quality control procedures.
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Perspectives on quality control, risk management, and analytical quality management.
Clin Lab Med. 2013 Mar;33(1):1-14. doi: 10.1016/j.cll.2012.10.003. Epub 2012 Dec 20. Review.
Managing quality vs. measuring uncertainty in the medical laboratory.
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Use and interpretation of common statistical tests in method comparison studies.
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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.
Am J Clin Pathol. 2006 Mar;125(3):343-54.
Designing quality control for neonatal screening assays.
Suolinna EM, Torresani TE, Westgard JO.
Southeast Asian J Trop Med Public Health. 2003;34 Suppl 3:103-6.
Design of internal quality control for reference value studies.
Clin Chem Lab Med. 2004;42(7):863-7.
The truth about quality: medical usefulness and analytical reliability of laboratory tests.
Westgard JO, Darcy T.
Clin Chim Acta. 2004 Aug 2;346(1):3-11.
Internal quality control: planning and implementation strategies.
Ann Clin Biochem. 2003 Nov;40(Pt 6):593-611.
Evaluation of rule-based autoverification protocols.
Crolla LJ, Westgard JO.
Clin Leadersh Manag Rev. 2003 Sep-Oct;17(5):268-72.
Models for combining random and systematic errors. assumptions and consequences for different models.
Petersen PH, Stöckl D, Westgard JO, Sandberg S, Linnet K, Thienpont L.
Clin Chem Lab Med. 2001 Jul;39(7):589-95.
Electronic quality control, the total testing process, and the total quality control system.
Clin Chim Acta. 2001 May;307(1-2):45-8.
The need for a system of quality standards for modern quality management.
Scand J Clin Lab Invest. 1999 Nov;59(7):483-6.
Points of care in using statistics in method comparison studies.
Clin Chem. 1998 Nov;44(11):2240-2. No abstract available.
Comparison of NCEP performance specifications for triglycerides, HDL-, and LDL-cholesterol with operating specifications based on NCEP clinical and analytical goals.
Fallest-Strobl PC, Olafsdottir E, Wiebe DA, Westgard JO.
Clin Chem. 1997 Nov;43(11):2164-8.
Quality control for qualitative assays: quantitative QC procedure designed to assure analytical quality required for an ELISA of hepatitis B surface antigen.
Green GA 4th, Carey RN, Westgard JO, Carten T, Shablesky L, Achord D, Page E, Le AV.
Clin Chem. 1997 Sep;43(9):1618-21.
QC Validator 2.0: a computer program for automatic selection of statistical QC procedures for applications in healthcare laboratories.
Westgard JO, Stein B, Westgard SA, Kennedy R.
Comput Methods Programs Biomed. 1997 Jul;53(3):175-86.
Automated selection of statistical quality-control procedures to assure meeting clinical or analytical quality requirements.
Westgard JO, Stein B.
Clin Chem. 1997 Feb;43(2):400-3. Review. No abstract available.
Design and assessment of average of normals (AON) patient data algorithms to maximize run lengths for automatic process control.
Westgard JO, Smith FA, Mountain PJ, Boss S.
Clin Chem. 1996 Oct;42(10):1683-8.
Laboratory precision performance: state of the art versus operating specifications that assure the analytical quality required by clinical laboratory improvement amendments proficiency testing.
Westgard JO, Bawa N, Ross JW, Lawson NS.
Arch Pathol Lab Med. 1996 Jul;120(7):621-5.
Error budgets for quality management--practical tools for planning and assuring the analytical quality of laboratory testing processes.
Clin Lab Manage Rev. 1996 Jul-Aug;10(4):377-81, 384-93, 396-403.
Matrix effects and the performance and selection of quality-control procedures to monitor PO2 measurements.
Olafsdottir E, Westgard JO, Ehrmeyer SS, Fallon KD.
Clin Chem. 1996 Mar;42(3):392-6.
A method evaluation decision chart (MEDx chart) for judging method performance.
Clin Lab Sci. 1995 Sep-Oct;8(5):277-83.
Allowable imprecision for laboratory tests based on clinical and analytical test outcome criteria.
Westgard JO, Seehafer JJ, Barry PL.
Clin Chem. 1994 Oct;40(10):1909-14.
European specifications for imprecision and inaccuracy compared with operating specifications that assure the quality required by US CLIA proficiency-testing criteria.
Clin Chem. 1994 Jul;40(7 Pt 1):1228-32.
Selecting appropriate quality-control rules.
Clin Chem. 1994 Mar;40(3):499-501. No abstract available.
A program for assessing statistical QC procedures.
MLO Med Lab Obs. 1994 Feb;26(2):55, 58-60. No abstract available.
Establishing and evaluating QC acceptability criteria.
Westgard JO, Quam EF, Barry PL.
MLO Med Lab Obs. 1994 Feb;26(2):22-6. No abstract available.
Cholesterol--a model system to relate medical needs with analytical performance.
Wiebe DA, Westgard JO.
Clin Chem. 1993 Jul;39(7):1504-12; discussion 1512-3. Review.
Analytical goal-setting for monitoring patients when two analytical methods are used.
Petersen PH, Fraser CG, Westgard JO, Larsen ML.
Clin Chem. 1992 Nov;38(11):2256-60. Review.
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