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In This Section |
The point on an OPSpecs Chart representing the intersection of bias and imprecision for a test. The Operating Point represents the current performance of a test.
OPSpecs Charts are an integral part of Westgard Advisor™ online. In general, an OPSpecs Chart is a tool for assisting a laboratory to select appropriate SPC rules and the number of control measurements for a QC procedure. OPSpecs Charts are plots of the allowable inaccuracy versus allowable imprecision. The highest line on the chart describes the maximum limits for inaccuracy and imprecision for a stable process. The lower line describes operational limits with the selected QC procedure. The Operating Point appears where the accuracy and precision of the test intersect.