Operating a laboratory within regulatory requirements can be a challenge. The wording of regulations is typically cryptic, and there’s always room for different interpretations. Audit trails are an important factor for compliance because they document a comprehensive history of sample analysis. Whether you capture sample history using a paper-based method or use an electronic system (LIMS), data integrity requirements equally apply. In this article, we have simplified the key features of audit trails for electronic systems based on the MHRA Orange Guide and FDA 21 CFR Part 11 requirements.
The audit record should be human readable and contain the following information:
It is important that your system audit trail adheres to data integrity requirements. This means that the system must prevent users from modifying or deleting the audit trail as well as obscuring original data entries. A well designed and compliant LIMS will provide read-only access to the audit trail through reporting or a user interface, and additional measures will be implemented to prevent unauthorised access at the database level (both physical and electronic access).
The audit trail is one example of an electronic record, and it is a regulatory requirement that the system has the ability to generate accurate and complete copies of the audit trail in a printable and human readable format. This allows you to conduct periodic compliance reviews to maintain a validated system. It also allows auditors, both internal and external, to review records as appropriate.