What action should have been taken before repeating controls after a quality control error was detected?

Before repeating controls after a quality control error is detected, it is essential to take corrective action. This process involves addressing the underlying issue that caused the control error to ensure that the subsequent results are valid and reliable. Corrective actions may include identifying potential sources of error, adjusting instrumentation, or even retraining personnel. Once these corrective measures have been implemented, controls can then be repeated with a higher confidence in their accuracy.

This step is crucial in maintaining the integrity of the laboratory testing process, as simply repeating controls without addressing the original error may lead to recurring issues, thus compromising the reliability of test results. This structured approach helps ensure that any systemic problems are dealt with before further testing is conducted, allowing for the generation of trustworthy data.