detailed hierarchal list of all components necessary to manufacture a product
Bill of materials (BOM) j.bis the term used to describe the "parts list" of components needed to complete a saleable end-item.BOMs are hierarchical in nature with the top level representing the sub-assembly or end-item. For example the end-item BOM for a Personal computer would list the computer, its major sub-assemblies (board, chassis, modem, keyboard, display, etc.) as well as additional materials needed for a complete saleable product -- shipping box, user manual, packaging, packaging labels, etc.
See more at Wikipedia.org...