Westgard QC Online Quality Control Plotter


James O. Westgard and Paul Schilling

This is a training and education tool for quality control in healthcare laboratories. It is designed to help users to plot quality control data on Levey-Jennings Control Charts. Users can either enter or calculate basic quality control data, such as mean, standard deviation, as well as control limits to draw on the control chart.

Users can enter up to 20 data points to plot on the control chart.

Note that the graphics generated will "pop up" - you will need to allow pop up windows in your browser.

Please let us know what you think of them.

See QC - The Calculations for an explanation and equations for these calculations.
See QC Calculator Problem Set if you want to work with some sample data.
 NOTE: These Javascript Calculators only work on browsers that support Javascript!

Fill these blanks in if you want to print out a hard copy of your data after you enter it
Analyst  
Test  
Control Material  
Units  
Comments  

Control Chart Parameters
Enter the control mean:   
Enter the control standard deviation:  
Enter up to 3 control limits you wish to evaluate 
(enter the multiplier number only, i.e. 2, 3, 3.5, etc.):		    
Number of values along the X axis:
The number of data points you wish to plot 
Plot provided data points (below):   
Plot control chart:  

Control Data
1
11
21
31

Copyright © 2003, 2009. All rights reserved.
Westgard QC, Inc., 7614 Gray Fox Trail, Madison WI 53717
Call 608-833-47183 or e-mail us at westgard@westgard.com