For how long must a laboratory retain the identification assigned to a test or calibration item?

The requirement for retaining the identification assigned to a test or calibration item for the life of the item in the laboratory is grounded in the principles of traceability and quality control. Maintaining identification throughout the lifespan of the item ensures that it can be accurately tracked, thereby helping to uphold compliance with industry standards and regulations.

This retention facilitates consistent oversight of the equipment and its performance. If any issues arise, having a clear record of the item's identification allows technicians to trace back through the calibration history, assess any previous results, and determine the impact of those results on testing or production processes.

In terms of compliance and quality assurance, it is vital that laboratories maintain this level of diligence regarding their calibration items. Other options might suggest shorter retention periods that could compromise the integrity of the quality management system and hinder the ability to perform thorough audits or investigations if discrepancies arise. Keeping the identification indefinitely—as required to the end of the item's life—ensures that all relevant information is available for necessary reviews and quality checks.