Westgard wrote the book on Quality. More than once. The essential skills, the deep insights, and the critical tools to optimize your Quality Control, your Method Validation (and Verification), and your Six Sigma metrics are here.

In January 2022, we lost a great light in the constellation of quality leaders of laboratory medicine. We mourn the passing of Per Hyltoft Petersen.

A recent Westgard, Bayat, and Westgard paper published in Clin Chim Acta had a one digit error. But that error cascaded throughout the paper. Here are the corrections.

Determining your QC frequency used to be the reserve of the few and highly sophisticated. It's time we made some calculators available so the rest of the world can do it.