Assigning Maintenance Packages 
Use
If you want to use a maintenance task list for planned maintenance (see
Maintenance Task Lists for Planned Maintenance) you can assign maintenance packages to individual operations in a maintenance task list. You cannot assign maintenance packages to sub-operations.The assignment of maintenance packages has been simplified for Release 4.5A. You can also assign maintenance packages as before (up to Release 4.5A). For more information see
Assigning Maintenance Packages (to Release 4.5A).Prerequisites
You have entered a maintenance strategy in the header of the maintenance task list (see second step).
Procedure
The Maintenance package overview screen is displayed.

Once you have assigned maintenance packages to operations, you cannot change the maintenance strategy assigned to your maintenance task list.