What is the function of an audit trail in an electronic CBM T6 system?

• A. They are optional and rarely used
• B. They provide a documented history of data creation, modification, and access
• C. They replace the need for data backups
• D. They are used to verify physical inventory counts

Answer: (B)

An audit trail in an electronic CBM T6 system serves to record a documented history of data creation, modification, and access. It logs who did what, when, and often what the previous and new values were, creating accountability and traceability for data used in condition monitoring and maintenance decisions. If sensor data is questioned or a configuration change is suspected, the audit trail lets you reconstruct events, identify potential tampering, and assess data integrity. It supports compliance with data-management standards and helps with troubleshooting and recovery after a failure because you can see exactly how data evolved. It does not replace data backups, since backups provide copies of data for recovery; audit trails do not provide full data restoration. It also does not relate to verifying physical inventory counts, which is a separate process. So the best description is that an audit trail provides a documented history of data creation, modification, and access, enabling traceability and integrity of system information.