Levey-Jennings Quality Control Charts

How to Subscribe
MLS & MLT Comprehensive CE Package
Includes 176 CE courses, most popular
$109Add to cart
Pick Your Courses
Up to 8 CE hours
$55Add to cart
Individual course$25Add to cart
Need multiple seats for your university or lab? Get a quote
The page below is a sample from the LabCE course Introduction to Quality Control. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

Learn more about Introduction to Quality Control (online CE course)
Levey-Jennings Quality Control Charts

Quality control charts are used to record the results of measurements on control samples to determine if there are systematic or random errors in the method being used. The most common type of chart is the Levey-Jennings chart.

There should be a separate control chart for each method being monitored and separate charts for normal and abnormal controls. The mean and standard deviation of the control being used should be noted on the chart. These should be determined based on at least 20 measurements over 20 days.
Here is an example of a Levey-Jennings chart:
Each time the control is tested, the result is marked on the chart at the appropriate standard deviation level. For instance, if the mean for a control is 15 and the standard deviation 5, if you test a control and get a value of 22.5, the chart is marked at +1.5 SD for that day.