Hi Ashely,
Maintenance related to projects shall be maintained through PM-PS integration.
Here maintenance orders will carry the cost and will be settled to project WBS.
Budget control shall be maintained at these WBS.
Maintenance Orders shall be assigned to corresponding WBS / Network.
Here may use PM/PS reff. element also.
For this you need to maintain few settings at network level as mentioned above.
Regards,
VINOD.V