...

In the Reserve Warehouse field, specify the warehouse in which the finished goods materials, parts, or components will be stocked until shipped for the customer or customersused for manufacturing.

The "Production Order (create)" form. The Inventory tab

...

The Characteristic column is available if the Enable Item Characteristics option is selected on the Administration > Settings > Purchasing and Warehouses form. In this column, you can specify additional properties of each purchased item item (material, component, or part) if the Use Characteristics option is selected for the item in its master record (see Items).

...

The Specification column is populated automatically with the default specification assigned to the item that requires additional assembly.In the Comment column, you can specify some additional information about the items or the manufacturing process.

The tab toolbar buttons

Click the Fill by Specification button to populate the inventory Items list with items and raw materials listed in the specifications of the finished goods to be produced.

...