Articles

1. Elsa F. Quam, BS, MT(ASCP), QC–The Out-Of-Control Problem, retrieved June 6, 2006, from the Basic QC Practices Lessons section of Dr. James O. Westgard's Web site at http://www.westgard.com/lesson17.htm.
2. Westgard J.O., Burnett RW. Precision requirements for cost-effective operation of analytical processes. Clin Chem 1990; 36:1629-1632.
3. Westgard, J.O. et al., Combined Shewhart–CUSUM Control Chart For Improved Quality Control In Clinical Chemistry; CLIN. CHEM. 23/10, 1881-1887 (1977).
4. Westgard, J.O.; Barry, P. L.; Hunt M.R.; Groth, T; A Multi-Rule Shewhart Chart For Quality Control In Clinical Chemistry; CLIN. CHEM. 27/3 493-501 (1981).
5. Westgard, J.O.; Koch, D.D.; Oryall, J.J.; Quam, E. F.; Feldbruegge, D. H.; Dowd, D. E.; Barry, P.L.; Selection Of Medically Useful Quality Control Procedures For Individual Tests Done In A Multi Test System; CLIN. CHEM. 36, 230 (1990).