Manufacturing bill of materials

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A manufacturing bill of materials (MBOM) is a type of bill of materials (BOM) reflecting the product as planned by manufacturing engineering, also referred to as the "as manufactured", "as built" or "as ordered" bill of materials. This type of bill of materials may and most times does differ from an engineering bill of materials (EBOM). The "as built" structure is meant to reflect how an end-item is manufactured on the shop floor.

It is a list of the parts, materials, documents and tools required in the manufacture of a product. This BOM includes material that is contained in drawing notes and typically also includes an indicator of whether manufacturing intends on buying or making the indicated material. The MBOM includes any synthetic part numbers and is the driver for all manufacturing requirements in MRP and ERP systems.