Expired Calibration Standard and Pressure at the Closing Meeting
During a process audit of final inspection for glucose test strips, the auditor observes an inspector using a calibration solution bottle with an expiry date of 12 January; today is 3 February. The inspector says the bottle was opened last week and the label is from the old bottle; a new bottle is in the cabinet. The calibration log shows a calibration performed that morning with a pass result and a signature. The production supervisor interrupts and says this is a minor label issue, the company has always passed external audits, and writing it up will stop the line. The auditor's sampling plan for the day includes five work orders; two have already been reviewed with no issues. The auditor has 90 minutes left before the closing meeting and a flight in four hours. The quality manager is unavailable.
1. How should the auditor handle the immediate situation and the supervisor's request?
Read the worked answer
The auditor should remain courteous but not accept the supervisor's characterization or request. The request not to write up a finding is an attempt to influence the audit conclusion and must not change the evidence-based decision. First, secure the objective evidence: record the bottle identity, expiry date, contents, and location; note the calibration log entry and signature; observe whether the new bottle is actually in use; and ask the inspector to explain the sequence without coaching. Interview the supervisor separately and ask for the calibration procedure and reagent control records. Do not stop the line unless there is an immediate patient safety risk requiring escalation, but do inform the quality manager or deputy. If the quality manager is unavailable, escalate through the available management chain and document the escalation.
2. What further evidence is needed to decide whether this is a calibration failure or a record-control failure?
Read the worked answer
Determine whether the expired bottle was actually used for the calibration or whether the new bottle was used and the old label created a documentation error. Check the calibration procedure for requirements on opened-vial dating, expiry, storage, and labeling. Review the calibration log, the equipment identification, and the raw data for the morning calibration. Compare the result with a repeat calibration using a verified standard. Interview the inspector and supervisor separately, and sample other calibration events for the same standard and other inspection stations. Review training and competence records. If the expired standard was used, the pass result is not valid and product released since the last valid calibration may be affected. If the new standard was used but records are inaccurate, the issue is still significant because the record cannot demonstrate control.
3. How would you classify and document the finding, and what should happen before the closing meeting?
Read the worked answer
Classification depends on the evidence. If an expired calibration standard was used and product was released on invalid results, a major nonconformity against 7.6 and 8.2.6 is likely, with possible 4.2.5 record issues. If the standard was not used but the record is unreliable, a nonconformity against 7.6 and 4.2.5 may still be major if the process cannot demonstrate measurement validity. Document the requirement, the evidence, the product effect, and the containment needed. Before closing, verify whether the line is still releasing product, request containment and re-calibration, and sample the remaining work orders for the same condition. If time is insufficient, state the limitation in the closing meeting and arrange follow-up rather than rushing an unsupported conclusion. The supervisor's pressure should be recorded as context, not as a reason to downgrade.