The usage of the BOM you are creating and the usage of the BOM you are copying from do not need to be the same. The item statuses of the copied item can be extended or reduced in the new BOM usage if a copy default is defined.
In Customizing for Production, you define copy defaults by choosing Bill of Material
Example of a copy default
You want to create a BOM with usage Production (1).
The item statuses are defined such that all items are relevant to production, and items can be relevant to design or spare parts.
You enter a BOM with usage Engineering/design (2) that you want to copy.
The item statuses are defined such that all items are relevant to design, and items can be relevant to production or spare parts (new usage 1; usage of source BOM 2).
According to this copy default, the items you copy to the new BOM are marked as only relevant to production and design. All other indicators in the source item are ignored.
The items are copied to the new BOM as they are, insofar as this is possible.
As the Indicator: item relevant to production is a required entry in the new BOM with usage Production (1), and this indicator may not be maintained in all items in the source BOM with usage Engineering/design (2), you may need to enter the Indicator: item relevant to production manually.