- SPC enables accurate IHC test results within a lab over time.
- The Metric SPC Workflow steps include: Spot, Stain, Scan, Analyze, and Assess.
- The Metric SPC Report includes a daily Levey-Jennings graph and related statistics.
- The Metric daily Levey-Jennings graph tracks QC results over time against an expected mean and acceptable error limits. A control result is expected to vary slightly from day to day, above and below a mean value.
- When reviewing your Metric Levey-Jennings graphs, you are generally looking for three categories of quantitative errors. Recognizing these patterns offers clues as to the root cause of an assay issue. The three patterns include: Drift, Sporadic Outlier, and Shift.