How to Use This Report

The primary use of the Bias and Imprecision Histogram is to detect changes in performance over time and to identify if changes in performance are due to bias, imprecision, or both.

Although you can use this report to detect abnormal CV or bias, the Bias and Imprecision Histogram Report does not contain specific thresholds for allowable bias or allowable imprecision.

The determination of whether a shift in performance is meaningful or problematic can be made from other metrics, including the standard deviation index (SDI) or coefficient of variation ratio (CVR) provided on the Laboratory Comparison Report or by using biological variation values for allowable bias and imprecision.