Project managers can be granted administrator permissions for specific projects by the lead Polarion administrator. This gives a project manager the ability to manage users and roles as well as customize the system configuration specifically for the project. If you are granted project administrator permissions, you should look at relevant topics in the Administrator's Guide.
If you have a Polarion product that supports the Work Records feature that enables team members to create records of blocks of time spent on specific assigned items, and your process utilizes this feature, you may wish to freeze reporting periodically... weekly, monthly, or quarterly, for example, in order to understand the costs for some period of time. You can do this by configuring a locking date for Work Record in the project's Administration interface. Work records dated on or before the configured locking date cannot be modified or removed. For information, see Administrator's Guide: Configuring Work Records.