Run 20 The last five control results on the high material and the last five results on the low material all are lower than their respective means, giving a total of ten consecutive control results on one side of the mean. The original W.S. Tyler Ro-Tap® is the industry standard for consistent, repeatable particle size testing. How can you find out whether its necessary to use a multirule QC procedure? The 12s rule is very commonly used today, and while it provides high error detection, the use of 2s control limits gives an expected high level of false rejections. Click here if you want to print a larger version of this chart separately. That’s why the details of the protocol are so important if a laboratory is to maintain consistent interpretation and consistent quality. An experienced analyst might notice the unusual pattern and want to investigate what’s going on.
You can do this in one of three ways: X11 If you logged into the HPCC using the -X flag, you can have it show you graphics. The oil-less design means these pumps do not produce carbon monoxide, oil vapor or oil mist. Plot these results, one from Control 1 and one from Control 2, for each day. Generally the two files have the same name, and just different file extensions.
Use a 12s warning rule and the 13s/22s/R4s/41s/10x rejection rules with 2 control measurements per run. That’s why a quantitative QC planning process is important. Issues in using multirule QC procedures Should you use a 12s warning rule to trigger inspection by the other rules in a multirule QC procedure? It depends on your specific situation. This lesson combines basic QC theory and practice to show you how. Dr. Westgard walks you through a Levey-Jennings chart day by day, plotting the control data and pointing out which run violates which rule.