You use the Item Assembly Structure tab in the Item Master (SP) application to create the item assembly structure (IAS), which is a list of the individual parts and subassemblies that are required components of an item. You then can use the IAS as a template, copying it to an asset or location record rather than retyping the parts information. Although you can define an IAS for any item, you use IASs primarily on rotating items and items in a kit.
The header section at the top of the Item Assembly Structure tab contains:
the top-level item number and description, which shows the parent item of the IAS
the current-level item number and description, the components of which show in the Children table window
the "belongs to" item number and description, which shows the item that the current-level item belongs to in the hierarchy
remarks
In the Children table window, you can add, view, modify, or delete the individual parts and subassemblies for a parent item.