Each time you gain a rank of this feat, choose 1 category of item from the list in Crafting Formulae.
You have learned how to be much more efficient in your use of materials when crafting that type of item. You must choose a different item type each time you gain a rank of this feat.
When crafting an item of the chosen type, if the item can be crafted in Batches, you increase the Batch size by +1 when you craft a Batch of that item.
If the item cannot be crafted in Batches, reduce the number of components required to craft that item by -1, to a minimum of 1 of any given material or aspect required for the item.