Project Edit Locking Overview

FinancialForce PSA uses project edit lockingClosedA mechanism used to manage situations where multiple users need to edit project tasks, assignments and dependencies in the project plan. Applies to native Salesforce objects and in Project Task Gantt and Gantt. to manage situations where multiple users need to edit project tasks, assignments and dependencies in the project plan. The ability to edit a project's tasks is "locked" to your Salesforce user—through Project Task Gantt or the standard Salesforce interface—preventing other users from making or saving any changes.

You can collaborate with others on the project plan without causing data conflicts as follows:

Notes: Regardless of configuration, locked projects will always become available for editing by others after four minutes of user inactivity.
Administrators can configure project edit locking. See Configuring Project Edit Locking for more information.
Project edit locking only applies to project tasks and their child objects, not to other project-related objects such as assignments, resource requests or schedules.