Should all Phantom Sets be Consumable or Stockable?
If a product has a BOM of type Phantom Set then should that product necessarily be Consumable or Stockable?
If it is set to Consumable then a Delivery Order will not check Stock that the Phantom Sets components are available.
If is is set to Stockable then it doesn't make sense because a Phantom Set is, by definition, never stocked.
The third option, Service, is not even considered.
We assume that there is only one BOM per product.