How to Set Fixed Limits
WinLIMS has the ability to flag samples based on dynamic and fixed control limits. Dynamic control limits are calculated automatically by LIMS, sigma and mean are saved in the "Fixed SQC Limits" Table. Fixed limits need to be put into the table in order for LIMS to flag those failures. This tutorial will provide information needed to set-up fixed control limits.
1.0 Locate the Fixed SQL Limits Table
- From Home page hover cursor over "Administration"
- Hover cursor over "Sample Types"
- Click on "fixed SQC Limits"
2.0 Locate Appropriate SampleType
Click on "Bulk Code" text
2.1 Find SampleType
In the search text box type in the bulk code of the product for which you are setting up fixed control limits.
2.2 Find SampleType
Click on the binoculars icon to search for the SampleType
2.3 Find SampleType
Click Select next to the appropriate Product Name
2.4 Find SampleType
Refresh the page by clicking on the "refresh" button next to the text box with bulk code as shown above
3.0 Set-Up Fixed Control Limits
This table contains a list of each parameter along with the associated statistics for Dynamic Control Limits. Dynamic Control Limits are calculated based on historical data computation of average (AVERAGE) and standard deviation (ST_DEV). They are only populated after at least 5 samples are accumulated for that specific Sampletype version. When you create a new version of a Sampletype these are cleared and you must wait for 5 samples to accumulate again. Do not change these values.
To set Fixed Control Limits, first calculate the average value and standard deviation that is equivalent to the control limits you plan on setting. After you have these values you can type them into the "Fixed Limits Mean and Sigma" designated text boxes as shown above. "SET_AVG" is the average used to calculate the fixed control limits and "SET_STD" is the standard deviation used to calculate the fixed control limits.
3.1 Save Changes
Press on the save button to save your changes.