BOMs are often part of engineering drawings, specifically with drawing sheets of assemblies. They show more specific information about the product we are working on. For example, a typical list of materials might contain the following information: 

• Names of the parts in the assembly 
• Part numbers
• Quantity of each part 
• Sequential listing of each entry

However, they are not limited to this information. BOMs are customizable, depending on the established practices and the application needs. Other information that can often be found in BOMs is costs, manufacturer, materials, store locations, reference numbers, and so on. The following are two examples of assembly drawings with BOMs. Note that each table is considered a BOM. The following diagram is a mechanical cap. The BOM there includes the PART NAME, PartNo, DESCRIPTION, QTY, Cost per part, and Total Cost per part. It also highlights the Total Cost for all the parts and the Highest Cost for one part, and also includes a subassembly and its parts noted under the name damper assembly:

The following diagram and BOM are of a simple coffee table. The bill includes PART NAME, COST PER PART (USD), QTY, and TOTAL COST PER PART (USD). Note that the information in this bill is different than the one shown previously:

Throughout this chapter, we will be working to create the preceding drawing sheet and BOM from scratch. You can download all of the parts and assembly files for this chapter. Our first step will be to generate a standard BOM, which we will do next.