When creating a purchase order for an assembly of parts, multiple purchase orders are created and you have the option to group or separate purchase orders that include multiple parts from the same supplier.
Option 1: Separate each component part on a separate PO
A single purchase order will be created for each component part you are ordering.
Option 2: Group parts from the same supplier on the same PO
Component parts from the same suppliers will not automatically be grouped together. You will be prompted with an option to group parts for the same supplier into the same purchase order, as shown below.
Check this setting for your assembly order if you would like your parts consolidated into fewer purchase orders, by supplier.