The generate public events for project deliverable status changes feature is a feature that allows you to send notifications or trigger actions when the progress status of a deliverable changes from one value to another. For example, when the status of a deliverable is set to Complete, you can send a notification to the owners of the associated tasks or update the status of the tasks accordingly. Two statements that are true about this feature are:
The public event is not generated when a deliverable is created or deleted. This feature only generates events when the progress status of a deliverable changes, not when a deliverable is added or removed from a project or task.
The public event is generated when the progress status for a deliverable changes. This feature generates events when the progress status of a deliverable changes from one value to another, such as from Not Started to In Progress, or from In Progress to Complete. You can define rules and actions for each progress status change using Business Process Management (BPM) Worklist. The public event is also not generated when the priority of a deliverable changes, as this feature only generates events when the progress status of a deliverable changes. https://docs.oracle.com/en/cloud/saas/project-portfolio-management/20c/oapfm/manage-project-execution.html#OAPFM2356211

Reference https://docs.oracle.com/cloud/latest/projectcs_gs/OAPEM/OAPEM1122096.htm The following table lists the project statuses and what you can do with projects in that status.
Project Status
What you can do?
Draft
Project managers can view draft projects in the Project Manager Dashboard and use the projects for requirements planning.
Team members can,t see the tasks from draft projects on the Team Member Dashboard or in the My Work area.
Active
Project managers can view active projects in the Project Manager Dashboard and use the projects for requirements planning, project execution, and reporting.
Team members can view task assignments on active projects on the Team Member Dashboard and My Work area.
Pending Close
Project managers can view pending projects in the Project Manager Dashboard and use the projects for project tracking, and reporting.
Team members can view task assignments on pending projects on the Team Member Dashboard and My Work area.
Submitted
Project managers can view submitted projects in the Project Manager Dashboard and use the projects for project tracking, and reporting.
Team members can view task assignments on submitted projects on the Team Member Dashboard and My Work area Closed Project managers can,t view closed projects in the Project Manager Dashboard or use the projects for requirements planning, project execution, and reporting.
Team members can,t view tasks of closed projects on the Team Member Dashboard or in the My Work area.

Reference https://fusionhelp.oracle.com/helpPortal/topic/TopicId_P_988B43C997365159E040D30A68813832
https://docs.oracle.com/cd/E48434_01/fusionapps.1118/e49622/F1125377AN61D92.htm

To put in a validation process that allows only a certain number of maximum hours an employee can charge in a day, and a minimum of hours he or she can report in a week, you need to use time entry rules. Time entry rules allow you to define the conditions and actions for validating time entries based on various attributes such as hours, dates, projects, tasks, etc. You can also specify the error messages and severity levels for the time entry rules. https://docs.oracle.com/en/cloud/saas/project-portfolio-management/20c/oapfm/manage-project-time-and-labor.html#OAPFM2355991

Reference https://docs.oracle.com/cd/E51367_01/projectop_gs/OAPJC/F1071488AN1004C.htm To import and process third-party transactions that are costed and accounted, you need to set the Transaction Source Options for the transaction source that you use to import the transactions. The Transaction Source Options allow you to specify whether the transactions are costed and accounted by the source system or by Oracle Fusion Cost Management. You can also specify whether to validate and transfer costs and accounting entries to projects and general ledger. https://docs.oracle.com/en/cloud/saas/project-portfolio-management/20c/oapfm/manage-project-costs.html#OAPFM2355941