Which option is a core element of QC planning for immunoassays?

Which option is a core element of QC planning for immunoassays?

• A. Reducing calibration frequency to zero
• B. Choosing appropriate controls
• C. Eliminating external quality assessment
• D. Ignoring interference monitoring

Answer: (B)

Choosing appropriate controls is essential for QC planning in immunoassays. Controls provide a known reference in every run, letting you verify that the assay is performing correctly and consistently across runs, operators, and days. They help you detect both bias (inaccuracy) and imprecision (random variation) and set meaningful acceptance criteria so you can decide if a result is trustworthy or if investigation is needed. Selecting the right control materials means using well-characterized samples that resemble the patient matrix and cover the clinically relevant range (low, medium, high) so you can monitor performance across the assay’s dynamic range. With appropriate controls, you can apply rule-based decisions (such as when to flag a run or recalibrate) and track trends over time to catch drift early. While calibration, participation in external quality assessment, and interference monitoring are also important parts of QC, nothing replaces the core role of controls in signaling whether a specific run is acceptable.

Choosing appropriate controls is essential for QC planning in immunoassays. Controls provide a known reference in every run, letting you verify that the assay is performing correctly and consistently across runs, operators, and days. They help you detect both bias (inaccuracy) and imprecision (random variation) and set meaningful acceptance criteria so you can decide if a result is trustworthy or if investigation is needed. Selecting the right control materials means using well-characterized samples that resemble the patient matrix and cover the clinically relevant range (low, medium, high) so you can monitor performance across the assay’s dynamic range. With appropriate controls, you can apply rule-based decisions (such as when to flag a run or recalibrate) and track trends over time to catch drift early. While calibration, participation in external quality assessment, and interference monitoring are also important parts of QC, nothing replaces the core role of controls in signaling whether a specific run is acceptable.