Additional Capabilities > Manufacturing Process Management > Transforming an eBOM into an mBOM > Maintaining an mBOM > Removing Occurrences
  
Removing Occurrences
There are two reasons for removing occurrences.
If you reduce the quantity on a part to a number that is less than the number that reference designators currently define, a message appears prompting you to switch to occurrence mode and remove occurrences. For example, if a part with a quantity of 3 has reference designators defined for each of its 3 occurrences and you decrease the part quantity to 2, you must select an occurrence to remove.
To remove a reference designator for an occurrence of a part at any time, do one of the following:
Click the remove icon.
Clear the value in the Reference Designator column.
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This action only clears the name, it does not remove the occurrence.