Internal Analytical Quality Control Using the Cusum Chart and Truncated V-Mask Procedure
- 1 July 1980
- journal article
- research article
- Published by SAGE Publications in Annals of Clinical Biochemistry: International Journal of Laboratory Medicine
- Vol. 17 (4) , 205-211
- https://doi.org/10.1177/000456328001700409
Abstract
It is recommended that quality control data be recorded on a standard form to facilitate calculation of the cusum increments and of the cumulative sums (cusums) for plotting on the cusum chart. The ‘in control’ and ‘out of control’ judgements are made with the aid of a truncated V-mask. Full details of calculation procedures are described without recourse to statistical theory so that the cusum and truncated V-mask procedure may be carried out by operators without training in statistics.This publication has 9 references indexed in Scilit:
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