Tools, Technologies and Training for Healthcare Laboratories

Pop Quiz: which method would you accept?

Posted by Sten Westgard, MS

So here's a Normalized Method Decision chart for a cholesterol method.

2012-CholesterolQuality-HighLevelBlank-NormMedx
Which method would you choose?

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Well, what if this was the same method, but just plotted with different quality requirements?

2012-CholesterolQuality-HighLevel-NormMedx
That's in fact what this is. It's the exact same CV and Bias data, but each time a different quality requirement is imposed. The Normalized Method Decision chart changes the operating point based on the context of the quality requirement.

It helps you realize what a big difference exists between different quality requirement sources. Under one set of goals, this method would be unacceptable. Under another set of goals, this is a world class method.

Now, which quality requirement is the right one to use?  See more about this at the essay Choosing the Right Goal - an example.

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Wednesday, 24 September 2025

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