A Bill of Materials (BOM) is an extensive list of items, parts and materials that are required to construct, manufacture or assemble a product. It is a document that provides detailed information about each individual part included with the finished product, including its exact quantity, specifications, and any other necessary information. The BOM is an essential part of any business as it allows for easy tracking of all components used in manufacturing, as well as for managing inventory costs. This knowledge also allows businesses to better plan for production and purchase the right components at the best prices.