Engineering bill of material template word excel Download

Engineering bill of material template word excel Download

A bill of materials (BoM) is a list of the parts or components that are required to build a product. At its most complex, a BoM is a multi-level document that provides build data for multiple sub-assemblies, which are essentially products within products.

For each item, the BoM includes the manufacturer’s part number (MPN) an approved manufacturers list (AML) and component descriptors. It may also include attached reference files, such as part specifications, computer-aided design (CAD) files and schematics. A production planning and inventory control system for material requirements planning (MRP) integrates data from production schedules with that from inventory and the bill of materials to calculate purchasing and shipping schedules for the parts or components required to build a product.

A bill of materials is usually used in cost accounting systems in order to calculate the cost of finished goods.

BOMs are especially useful in understanding the manufacturing and supply chain challenges involved with building any product, which include estimating costs, controlling inventory, and accounting for changes in material availability.


Thanks to its universal accessibility, Microsoft Excel is often the first choice software for BOM documentation. However, a generic spreadsheet is certainly not an ideal BOM tool, and consistently managing BOM information in Excel requires some dedicated planning and organization. A solid BOM template can definitely ease the pain, at least to a point. As designs become more complex, it’s easy to quickly outgrow the limitations of Excel as a BOM tool regardless of template quality. As such, it’s best to prepare for the future, and understand that once design reaches a certain level of complexity, circumstances will demand moving to a dedicated BOM system. That usually requires migrating data from existing Excel BOMs.

A bill of materials may contain the following information:

  • product code;
  • description of the product;
  • mechanical characteristics of the product;
  • vendor’s name;
  • size, length, weight or other required physical characteristic of the product;
  • test results (shrinkage, lead, etc);
  • estimated/actual yield (allocation, quantity used); and
  • further processing required (sponging, dyeing, enzyme bath, etc).

Bills of materials have the following advantages:

  • help to maintain a centralized and accurate record of information;
  • improve material management through responding to changes in production;
  • control inventory levels;
  • reduce obsolete parts;
  • control and reduce manufacturing costs; and
  • provide what-if capabilities for estimates or customer quotes.

BOM’s may be single or multi-level, depending upon company inventory and marketing policies. BOMs can be enhanced to include costing information by including labor and material costs in each lower level component and adding these costs from the bottom to the parent level. Application of overhead rates will then provide fully burdened manufacturing costs. Caution must be exercised when converting engineering BOMs to cost BOMs. Labor and material standards on cost BOMs are an estimate, and provide an accounting standard for the fiscal year. Consequently, they are a reference that must be adjusted by both labor and material variances to obtain actual costs.

The engineering BOM and routing sheets are two of the most important documents associated with the manufacturing process. The importance of maintaining accuracy cannot be overemphasized when considering the substantial impact that they have on product costing, inventory, and production management.


  1. Basic and Simple  bill of Material BOM Template- Engineering bill of materials template word excel DownloadOpens in a new tab.
  2. BOM template Free Download File -Free Download Opens in a new tab.

Sachin Thorat

Sachin is a B-TECH graduate in Mechanical Engineering from a reputed Engineering college. Currently, he is working in the sheet metal industry as a designer. Additionally, he has interested in Product Design, Animation, and Project design. He also likes to write articles related to the mechanical engineering field and tries to motivate other mechanical engineering students by his innovative project ideas, design, models and videos.

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