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Use
When you create an alternative date, the system checks (as for a date shift) the settings in Customizing for Engineering Change Management, under Set up control data.
In the Date shift dataset, you can define a time frame within which a date shift is allowed (warning time) or not allowed (error time).
See also:
Protected Time PeriodProcedure
To enter an alternative date:
You are processing a change master record or engineering change request.
The Alternative date: Overview screen appears.
You can assign this key only once per change number.
If you enter a date that is within a time limit for a warning message, you can still create the alternative date. However, you need to check the change objects to which you want to allocate the alternative date.
If you enter a date that is within a time limit for an error message, you cannot create the alternative date.
You can enter as many alternative dates as you need.

The overview screen also shows the Object allocations indicator in the ObjID field. The system sets this indicator automatically as soon as at least one object management record is assigned to the alternative date.
See also
: Object Management Record
