Combined Shewhart-cusum control chart for improved quality control in clinical chemistry.

@article{Westgard1977CombinedSC,
  title={Combined Shewhart-cusum control chart for improved quality control in clinical chemistry.},
  author={James O. Westgard and Torsten Groth and Thomas Aronsson and Carl-Henric De Verdier},
  journal={Clinical chemistry},
  year={1977},
  volume={23 10},
  pages={
          1881-7
        }
}
  • James O. Westgard, Torsten Groth, +1 author Carl-Henric De Verdier
  • Published in Clinical chemistry 1977
  • Medicine, Chemistry
  • We describe the adaptation of the decision limit cumulative sum method (cusum) to internal quality control in clinical chemistry. With the decision limit method, the cusum is interpreted against a numerical limit, rather than by use of a V-mask. The method can be readily implemented in computerized quality-control systems or manually on controls charts. We emphasize the manual application here and demonstrate how the technique can be implemented on existing Shewhart or Levey-Jennings control… CONTINUE READING

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