Explanation
Ref:
https://docs.oracle.com/en/cloud/saas/project-portfolio-management/19a/oapex/define-project-management-conf Topic - Microsoft Project Prevalidation: Explained The following table describes Prevalidation rules for tasks and resource assignments.
Level
Rule
Lowest-level tasks
One labor and multiple expense resources are allowed for a lowest-level task. Remove other resources.
Summary tasks
Only one labor resource with zero allocation is allowed for a summary task. Remove all other resources.
Milestone tasks
No subtasks are allowed under milestone tasks. Milestones must be lowest-level tasks.
Milestone tasks
Milestone tasks must have zero duration.
Milestone tasks
Only one labor resource, with zero effort, is allowed for a milestone task. Remove all other resources.
When exporting milestone tasks, ensure that the tasks:
* Are lowest-levels task with zero duration, that is, the same start and finish dates.
* Have only one labor resource assignment with zero effort.
* Have percent work complete values of 0 or 100 percent. Any other values are set to zero before export.

Explanation
Ref:
https://docs.oracle.com/en/cloud/saas/project-portfolio-management/19a/oapfm/project-foundation-configuration Topic - Asset Cost Allocation Methods: Explained The asset cost allocation method determines how indirect or common costs incurred on a project are allocated to multiple assets.
You can specify an asset cost allocation method to enable Oracle Fusion Project Costing to automatically allocate unassigned asset lines and common costs across multiple assets. Unassigned asset lines typically occur when more than one asset is assigned to an asset grouping level.
Projects and project templates inherit a default asset cost allocation method from the associated project type.
You can override the default at the project level. If you use capital events to allocate costs, then you can also override the asset cost allocation method at the event level.
The following table describes the available asset cost allocation methods.
Method
Basis of Cost Allocation
Actual Units
Number of units defined for each asset
Current Cost
Construction-in-process (CIP) cost of each asset
Estimated Cost
Estimated cost of each asset
Standard Unit Cost
Combination of the standard unit cost and the number of units defined for each asset Spread Evenly Equal allocation of cost to each asset

Explanation
Ref:https://docs.oracle.com/en/cloud/saas/project-portfolio-management/19a/faopm/subjectareas.html#Projects_ Analyze real-time information on project performance, including budgets, forecasts, costs, commitments, revenue, and invoices.
This subject area analysis allows cross subject area analysis between Funding, Invoices, Revenue, Budget, forecasts, Costs areas.

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