The best security practice to prevent unauthorized access is Identification and Authentication. This process ensures that only authorized personnel can access a facility’s work order system by:

Using secure logins (e.g., username/password, biometrics, multi-factor authentication).

Verifying user identities before granting system access.

Implementing role-based permissions to control system functions per user authorization level.

While data encryption (Option B) secures stored data, it does not control system access. Similarly, a proprietary user interface (Option C) is not a security measure on its own, and an HR employee database (Option D) is unrelated to system security​.