External quality assessment (EQA) results are used to:

External quality assessment (EQA) results are used to:

• A. compare performance with peer labs and drive improvements.
• B. replace internal QC.
• C. determine patient reference ranges.
• D. set staff salaries.

Answer: (A)

External Quality Assessment is about benchmarking a lab’s performance against other laboratories and using that comparison to drive improvements. By analyzing blinded samples with known values and sharing results with a central program, a lab can see how its accuracy and precision stack up against peers. This highlights biases, systematic errors, or drift that might not be evident from internal checks alone, and it provides concrete targets for corrective actions—whether that means recalibrating instruments, updating procedures, or retraining staff. Over time, tracking these external results helps ensure consistent quality and supports accreditation. This isn’t about replacing internal QC, which is the routine daily check of control materials to ensure ongoing reliability. It also doesn’t determine patient reference ranges, which come from population studies or local healthy populations, nor does it set staff salaries.

External Quality Assessment is about benchmarking a lab’s performance against other laboratories and using that comparison to drive improvements. By analyzing blinded samples with known values and sharing results with a central program, a lab can see how its accuracy and precision stack up against peers. This highlights biases, systematic errors, or drift that might not be evident from internal checks alone, and it provides concrete targets for corrective actions—whether that means recalibrating instruments, updating procedures, or retraining staff. Over time, tracking these external results helps ensure consistent quality and supports accreditation.

This isn’t about replacing internal QC, which is the routine daily check of control materials to ensure ongoing reliability. It also doesn’t determine patient reference ranges, which come from population studies or local healthy populations, nor does it set staff salaries.