What is used to restrict data entry and formula changes in financial planning?

Locking versions is the correct approach to restrict data entry and formula changes in financial planning. When a version is locked, it prevents users from making any modifications to that version of data, ensuring the integrity of the information as it stands. This feature is essential for maintaining accurate historical records and preventing unauthorized changes, particularly during sensitive periods such as a fiscal close or when preparing financial reports.

Locking versions allows organizations to control which data can be manipulated and provides a way to safeguard the planning process against errors and inconsistencies. By restricting changes, this tool helps maintain a clear audit trail and ensures that all stakeholders work from the same set of reliable figures.

The other options, while seemingly related to version control, do not specifically focus on the capability to lock down data entry and formula changes in the same way. Control versions may refer to managing different iterations of data, and protected or secured versions suggest a level of safety but do not explicitly indicate the functionality to lock out changes to data or formulas.