Which items should be present in assembly BOMs created for this course?

• A. Part numbers, part quantities, part descriptions
• B. Part numbers, part quantities, part descriptions, unique item numbers matching balloon numbers
• C. Part numbers, part quantities, unique item numbers matching balloon numbers
• D. Part numbers, part descriptions, unique item numbers matching balloon numbers

Answer: (B)

An assembly BOM must uniquely identify every component used in the assembly, show how many of each are needed, and link directly to the drawing so you can cross-reference what you see in the exploded view. Part numbers specify the exact catalog item, ensuring you get the right part. Part quantities tell you how many are required for the build. Part descriptions provide a clear, human-readable name so you can quickly understand what the item is without cross-checking every catalog entry. Unique item numbers that match the balloon numbers on the exploded-view diagram create a direct, unambiguous link between the drawing and the BOM, so each balloon corresponds to a single BOM line. Without this mapping, you could misread which balloon refers to which item, even if you have numbers and descriptions. The other options omit at least one of these essential elements, which would make the BOM less reliable for ordering, assembly, and traceability.