Choosing QC rules for monitoring quantitative methods is compulsory and often frustrating
and not easy. Part of these protocol there are many possible QC statistical 9rules9 (eg …

A computer program has been developed to help healthcare laboratories select statistical
control rules and numbers of control measurements that will assure the quality required by …

QC Validator 2.0 (Westgard Quality Corp., Ogunquit, ME) is a Windows application that
facilitates rational selection of quality-control (QC) rules. The user provides the performance …

Despite very high engineering standards for analysers, there is always some variation in the
outcome of the measurement of a particular sample between instruments, both in terms of …

Efforts to totally automate laboratory testing processes must address the issue of how to
assure the quality of the final test result. A recent survey by Tetrault and Steindel [1] reported …

Standard statistical quality control (QC) has been around since its introduction in 1950 by
Levey and Jennings. Today, while most laboratories use standard statistical QC processes …

The purpose of statistical quality control (SQC) 2 in the clinical laboratory is to assure that
reported patient results are fit for their intended use, not only when a measurement …

The error detection characteristics of quality-control (QC) rules that use control observations
within a single analytical run are investigated. Unlike the evaluation of QC rules that span …

500 CLINICAL CHEMISTRY, Vol. 40, No. 3, 1994 approach has been to aim for 0.90
probability for error detection with a 0.01 probability for false rejections, but we will allow Pfr …

BACKGROUND: It is very important to keep the quality of the process of clinical tests and for
that internal & extenal quality control procedures are performed in many clinical laboratorys …