BOM
A Bill of Materials (BOM) is a hierarchical listing of: all the raw materials, sub-assemblies, intermediate assemblies, sub-components, components, parts, and the quantities there-of, necessary to produce a final product. Because a BOM is arranged hierarchically, different levels represent different stages and/or pieces of the assembly with the top level representing the finished product. A BOM can be organized: as-built, as-designed, or as-maintained.
http://en.wikipedia.org/wiki/Bill_of_materials