Which practice is important for version security?

Locking completed versions is vital for version security because it prevents unauthorized changes to financial data and planning models that have already been finalized. When a version is locked, it ensures that the integrity of the information is maintained, preventing any alterations that could lead to inconsistencies or errors in reporting and analysis. This is particularly important in collaborative environments where multiple users may have access to modify data. By implementing locking mechanisms, organizations can safeguard sensitive information and ensure that once a version is validated, it remains as is, providing a reliable reference point for future comparisons, audits, or evaluations.

In contrast, while creating separate versions helps in organizing planning data, it does not inherently secure that data. Maintaining an editable sheet access can lead to risks if users are not adequately monitored for the changes they make. Lastly, keeping versions concise addresses the usability of versions but does not directly contribute to their security. Thus, locking completed versions stands out as the most effective practice for ensuring that once plans are finalized, they are protected from unintended modifications.