In a Levey-Jennings chart, what are the daily quality control values used for?

In a Levey-Jennings chart, the primary purpose of the daily quality control values is to monitor analytical performance. This chart provides a visual representation of the stability and accuracy of laboratory testing processes by plotting control values over time against established control limits. By regularly analyzing these charts, laboratory personnel can promptly identify trends, shifts, or outliers in test results, which may indicate issues with the testing process, reagents, or equipment. It serves as a crucial tool for ensuring that the tests remain reliable and consistent, ultimately leading to accurate patient results. This ongoing monitoring is essential for maintaining quality standards in laboratory operations.

Other options don't align with the primary purpose of a Levey-Jennings chart. For example, assessing laboratory costs or evaluating patient treatment outcomes pertains to broader management and clinical responsibilities rather than the specific analytical performance data that the chart focuses on. Additionally, tracking employee performance typically involves metrics and assessments outside the scope of quality control monitoring.