Configure the Subassembly Product Data
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On the product form of the subassembly, you must select the routes Manufacture and Make To Order. The Manufacture route takes precedence over the Buy route, so selecting the latter will have no effect.
If you would like to be able to purchase the subassembly in addition to manufacturing it, select Can be Purchased. All other fields on the subassembly product form may be configured according to your preference.
