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Maintaining the Create Initial Screen 
The Create Change Master: Initial Screen appears.
Do not enter anything if you want the system to assign a number itself. For more information, see Number Assignment for the Change Master Record.
To find out about the differences between the two types, see ECR/ECO.
For more information, see Determination of the Function of a Change Master Record.
For more information, see Change Type Affects Change Process.
For more information, see
Creating a Change Master Record with Parameter Effectivity. If you enter an effectivity type, the system creates a change master record with date validity.
For more information, see Creation of a Profile.
Here the system also copies all object management records from the change master record you are using as a reference. Check which object management records you require and delete any superfluous object management records from the new change master record if necessary.
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