Time Allocations 
A time allocation describes the date and time boundaries of an event that impacts the scheduling of a resource.
You use time allocations to define specific periods when a resource is or is not available to be scheduled to meet a demand. You use them for internal and external resources.
If you are integrated with SAP ERP HCM, see:
The following time allocation types are not transferred to mobile clients:
Time allocations with HR-relevant time allocation types
Time allocations with a recurrence
If a time allocation type becomes relevant for SAP ERP HCM, the corresponding time allocations must be deleted from the cell phone. Delete these time allocation types using the report CRM_WFD_TIMESPEC_DEL_FROM_CDB.
You use time allocations to define each condition where a resource is or is not available. Working Time is an example of a time allocation type where the resource is Available, as defined within the resource's service arrangement. The following are examples where the resource is Not Available, as defined within the resource header:
Vacation
Illness
Meeting