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Introduction to Bill Of Materials

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Rajat Singla
Rajat Singla

This document discusses different types of bills of materials (BOMs) used in product development and manufacturing. It describes engineering BOMs, manufacturing BOMs, and service BOMs. Engineering BOMs represent the design view and include components needed to make the product. Manufacturing BOMs represent the manufacturing view and include all parts and materials needed for assembly into a shippable product. Service BOMs deal with maintaining products over their lifecycle and include spare parts for repairs. The document emphasizes that accurate, up-to-date BOMs are essential for activities like sourcing parts, manufacturing, and servicing products.

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BILL OF MATERIALS
BOM ?
3 Recipe and shopping list for creating a product A bill of materials explains:  What to buy?  How to buy?  Where to buy?  Instructions to assemble BILL OF MATERIALS BOM is a comprehensive list of parts, items, assemblies and sub- assemblies required to get a product ready to sell All manufacturers building products, regardless of their industry, get started by creating BOM
4 TYPES OF BOM
5 Engineering BOM represents the engineering (design) view of a product It is organized by engineers based on the Computer-Aided Design (CAD) or Electronic Design Automation (EDA) tools used EBOM  EBOM provides components and directions to make a given product and includes things like raw materials, items, parts, subassemblies and interrelated data layers  It focuses on parts as they exist in the design sense, for example, on an assembly drawing.  It does not include things like packaging, shipping containers and other components needed for a shippable product, or specify how parts should be grouped at each stage of production.
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7 MBOM Manufacturing BOM represents the manufacturing view of a product, structured in a way that represents the way the product is manufactured It defines all the parts and assemblies required to build a shippable product. This includes packaging materials like colored boxes, CDs and quick start guides. It also incorporates items that are used in the assembly process, like liquid adhesives or tape  MBOM enables the final transition from product concept to a concrete, touchable object.  It drives manufacturing, operations, purchasing and logistics for a product. The information from the MBOM feeds the business systems used to order parts and build the product  How and where a part will be made impacts the purchasing of components and processed parts, the availability of inventory and the contents of build kits on the manufacturing line. It determines what steps happen on the assembly floor during the production run and what happens ahead of time (possibly at another vendor).
8 For designer, a T plate might be single part, but for manufacturing engineer it is two parts with welding operation.
9  It is mainly managed in ERP system for inventory and process planning. It deals with actual physical aspect of parts  Design or Manufacturing BOM can have components which might not be real or perishable items. For example, MBOM can have component for intermediate manufacturing operation which doesn’t exist as storage or tangible part MATERIAL BOM SBOM  It deals with Serviceability of Product. Once Part or Product is manufactured, it required to be service and maintained throughout Product life cycle. For heavy machinery it means managing serviceable parts inventory, periodic maintenance and overhaul of the system.  OEMs publish Service Bill of Material along with product specification, so that proper planning for spare part inventory, maintenance and overhaul can be done by the product owner.
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11 BOM MANAGEMENT TOOLS
12 BOM guides business activities like parts sourcing, outsourcing and manufacturing, so it is important to create a BOM that is well organized, correct and up-to-date BOM record may go through several iterations during the design phase, so you should have a way to distinguish between multiple BOM record versions. That way, when it is time for production, you can be sure each person who uses your BOM is consulting the correct version Getting information about right parts and right quantities ensure better purchasing decisions Early decisions can help negotiate with multiple vendors to obtain the most competitive pricing For companies that outsource manufacturing activities, it is especially important to create an accurate and revision-controlled bill of materials “Manufacturing is similar to a recipe. If you miss any ingredient or step, the outcome will likely be atrocious” A wise man once said…

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Introduction to Bill Of Materials

  • 3. 3 Recipe and shopping list for creating a product A bill of materials explains:  What to buy?  How to buy?  Where to buy?  Instructions to assemble BILL OF MATERIALS BOM is a comprehensive list of parts, items, assemblies and sub- assemblies required to get a product ready to sell All manufacturers building products, regardless of their industry, get started by creating BOM
  • 5. 5 Engineering BOM represents the engineering (design) view of a product It is organized by engineers based on the Computer-Aided Design (CAD) or Electronic Design Automation (EDA) tools used EBOM  EBOM provides components and directions to make a given product and includes things like raw materials, items, parts, subassemblies and interrelated data layers  It focuses on parts as they exist in the design sense, for example, on an assembly drawing.  It does not include things like packaging, shipping containers and other components needed for a shippable product, or specify how parts should be grouped at each stage of production.
  • 6. 6
  • 7. 7 MBOM Manufacturing BOM represents the manufacturing view of a product, structured in a way that represents the way the product is manufactured It defines all the parts and assemblies required to build a shippable product. This includes packaging materials like colored boxes, CDs and quick start guides. It also incorporates items that are used in the assembly process, like liquid adhesives or tape  MBOM enables the final transition from product concept to a concrete, touchable object.  It drives manufacturing, operations, purchasing and logistics for a product. The information from the MBOM feeds the business systems used to order parts and build the product  How and where a part will be made impacts the purchasing of components and processed parts, the availability of inventory and the contents of build kits on the manufacturing line. It determines what steps happen on the assembly floor during the production run and what happens ahead of time (possibly at another vendor).
  • 8. 8 For designer, a T plate might be single part, but for manufacturing engineer it is two parts with welding operation.
  • 9. 9  It is mainly managed in ERP system for inventory and process planning. It deals with actual physical aspect of parts  Design or Manufacturing BOM can have components which might not be real or perishable items. For example, MBOM can have component for intermediate manufacturing operation which doesn’t exist as storage or tangible part MATERIAL BOM SBOM  It deals with Serviceability of Product. Once Part or Product is manufactured, it required to be service and maintained throughout Product life cycle. For heavy machinery it means managing serviceable parts inventory, periodic maintenance and overhaul of the system.  OEMs publish Service Bill of Material along with product specification, so that proper planning for spare part inventory, maintenance and overhaul can be done by the product owner.
  • 10. 10
  • 12. 12 BOM guides business activities like parts sourcing, outsourcing and manufacturing, so it is important to create a BOM that is well organized, correct and up-to-date BOM record may go through several iterations during the design phase, so you should have a way to distinguish between multiple BOM record versions. That way, when it is time for production, you can be sure each person who uses your BOM is consulting the correct version Getting information about right parts and right quantities ensure better purchasing decisions Early decisions can help negotiate with multiple vendors to obtain the most competitive pricing For companies that outsource manufacturing activities, it is especially important to create an accurate and revision-controlled bill of materials “Manufacturing is similar to a recipe. If you miss any ingredient or step, the outcome will likely be atrocious” A wise man once said…