Populating bills of materials boms bruce a harding mechanical engineering technology
Sponsored Links
This presentation is the property of its rightful owner.
1 / 8

Populating Bills of Materials (BOMs) Bruce A. Harding Mechanical Engineering Technology PowerPoint PPT Presentation

  • Uploaded on
  • Presentation posted in: General

Populating Bills of Materials (BOMs) Bruce A. Harding Mechanical Engineering Technology. BOM is actually a parts lists (PL).

Download Presentation

Populating Bills of Materials (BOMs) Bruce A. Harding Mechanical Engineering Technology

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript

Populating Bills of Materials (BOMs) Bruce A. HardingMechanical Engineering Technology

BOM is actually a parts lists (PL)

  • Technically a BOM is a Parts List. However the term BOM has grown to be the common usage for the list portion of a drawing. A parts list, in turn, is one type of the broader terminology – associated lists

  • A parts list forms the cross-reference from the assembly to the definition information for the individual parts

Placement of a parts list (PL)

  • A PL is integral to the drawing data set and may be included on a graphic presentation sheet. Or it may still be integral to the drawing data set but shown on a separate sheet from the graphic presentation

  • Line items in a PL may be listed from top-to-bottom (heading at the top) or from bottom-to-top (heading at the bottom)

Integral parts list – on graphic sheet of drawing

Integral parts list – on separate sheet of drawing

Columns in a PL

•Required columns in a PL include: Quantity, Part or Identifying Number (PIN), Nomenclature or Description.

•Blocks for Next Assembly and Used On are required only if applications data is included, otherwise they are optional

  • Optional columns include CAGE code, Find Number (also known as Item Number), Weight, Document Number, Notes or Remarks, Units of Measure, etc.

Items ancillary to a PL

  • When Find Numbers (Item Numbers) are used, balloons and leaders indicate the parts referenced by the Item Number

  • Unlike detail drawings, an assembly with Find Numbers requires only sufficient views to identify an instance of each unique part, since the quantity column indicates how many are represented by that one instance

Information shown in a PL

•Find Numbers (Item Numbers): optional, but when used indicate the total number of unique parts

  • Part Number: indicates the numerical portion of the unique part specification

    • Standard parts – the numerical portion of its specification (Items 3 and 5)

    • Stock material – its size specification (Item 2)

    • Custom part requiring a drawing – a drawing number cross references to its detail drawing (Item 1)

    • Commercial part – a vendor or catalog number is used as the identifying number (Item 4)

Information shown in a PL

  • Quantity: indicates the quantity of a each unique part in the assembly

  • Description: the non-numeric portion of the part specification not otherwise shown in the Part Number column

  • Together these columns, plus any optional columns required, form the cross reference link between the assembly and its component parts, be they commercial, custom, standard or stock material

Source: ASME Y14.34M-1996 Associated Lists


The author wishes to acknowledge the support from the Society for Manufacturing Engineers - Education Foundation, SME-EF Grant #5004 for “Curriculum Modules in Product Lifecycle Management.”

  • Login