Bill of Materials

Bill of material (BOM) is a detailed inventory of the raw materials, assemblies, subassemblies, parts, and components required to create a product, including the quantity required to procure such. In a nutshell, it is a comprehensive list of all the items required to construct a product.

Table of Content

Bill of Material Definition & Meaning

A bill of materials (BOM) is information that identifies the objects or raw materials required to create any physical entity, whether it be a construction or a product.

It is a consolidated source of data employed in manufacturing a product and a list of the things required to construct a product and instructions on assembling it.

What Is a Bill of Material?

A bill of materials (BOM) is a detailed list of all the parts, pieces, assemblies, sub-assemblies, intermediate assemblies, documents, designs, and other materials needed to build a product. The BOM is a hierarchical representation of the formula used to make a final product. The bill of materials and accompanying documents detail the materials needed to source and construct an assembly.

10 Types Of Bill Of Material

Software Bill of Materials

A software bill of materials (SBOM) is a summary of all third-party components and the open source included in a codebase. A software bill of materials also identifies the licenses that regulate those components, their versions in the codebase, and any patch status, allowing security teams to rapidly discover any related security or license problems. With a software bill of materials, you can respond promptly to open source security, legal, and operational threats.


Project Bill of Materials

A bill of materials for a project is a formal and thorough hierarchical description of the precise things that must be included in a final product. It is a comprehensive list of raw materials, components, and instructions needed to build, produce, or repair a product or service. Project bills of materials can be created early in the project as part of the estimating and budgeting process, and they can also be used to determine schedules.


Maintenance Bill of Materials

A maintenance bill of material (BOM) is a comprehensive, formally structured inventory of the components that comprise a technical product or assembly. The list includes the object numbers of the different components and their amount and unit of measurement. A maintenance BOM specifies the structure of a technical object or material and can identify exactly where maintenance duties on a technical object are to be done.


IT Bill of Materials

In the process manufacturing industry, an IT bill of material is also known as a product structure, assembly component list, or production recipe. For example, if a bicycle manufacturer wishes to produce 1,000 bicycles, the materials bill will include all the individual parts required to construct the bicycle. The metadata identifies the goods or raw materials utilized to create any physical object, whether a structure or a product.


Garment  Bill of Materials

A garment bill of material is a list of raw materials to be gathered to create a garment and prepare it for shipping per the buyer’s specifications. Production merchants in the garment industry often create BOM. A garment BOM typically comprises the following items: item description, consumption per piece consumption with a specific unit of measure, estimated cost per unit, and total cost of each item.


Product Bill of Materials

product bill of material, also regarded as product structure, is a detailed list of items required for the production of the finished product, containing details of necessary raw materials, sub-assemblies, and assemblies that are required to create or manufacture a product, and which is used as a communication medium between the manufacturing team and the stores’ team. It might also include the work required to put a product together. It serves as a master structure for everyone involved in the production process.


Manufacturing Bill of Materials

A manufacturing bill of materials outlines all components and assemblies needed to construct or manufacture a complete and shippable product. It is a consolidated information source that contains a list of materials needed to create a product and instructions on how to do it. In reality, product manufacturers begin the assembly process by developing a manufacturing BOM.

Sales Bill of Materials

In the sales stage, a sales bill of materials (SBOM) describes the specifics of the product prior to manufacturing. The list of final items and the components required to produce them show separately in the sales order document in an SBOM. Instead of being maintained as an inventory item, the final product is controlled as a sales item.


Fashion Bill of Materials

A fashion bill of materials serves as both a manufacturing recipe and a purchasing list. The entire components or elements needed to create a finished and marketable garment are all in a fashion BOM. A well-defined fashion BOM enables you to produce your product efficiently and cost-effectively.


Construction Bill of Materials

A construction bill of materials is a document that painstakingly details all of the raw materials and labor necessary to create a home. This document, prepared by the architect, is significant for you because it specifies the cost of the building and allows you to inspect its quality. The raw materials and labor listed in the building bill of materials are classified according to the workers engaged in the construction process.


Bill of Material Uses, Purpose, Importance

A bill of materials essentially contains the components/parts, materials, and accessories that comprise the overall product (including its packaging). It will assist in keeping your new product manufacturing project on track at all stages and evolve as your new product development proceeds. Two sets of papers are critical when developing a new product: design deliverables and the Bill of Materials (BOM), although this article will focus on the BOM.

Develop a Centralized Source of Information

A bill of materials (BOM) is a consolidated source of information used in product manufacturing. It is critical to create an accurate bill of materials (BOM) because it guarantees that parts are accessible when needed and that the assembly process is as efficient as feasible. If the BOM is incorrect, it can cause production to halt, increasing operational costs because time is required to find missing parts, initiate another manufacturing order, or discover the right assembly procedure.

Shopping List is Customized

The bill of components is sometimes referred to as “recipes” or “shopping lists” since it details all of the basic materials and amounts necessary. A detailed bill of materials streamlines component purchase. Production jobs can be scaled up or down based on budget.

Avoid Running Out of Resources

Material requirements planning that is organized, inventories, and exact numbers guarantee that you never run out of supplies again. A powerful inventory management system incorporating a manufacturing module allows you to establish reminders when stock is running low. When component levels fall below a certain threshold, certain inventory software will automatically create a purchase order to a supplier. Proper BOM research frequently results in correct equipment documentation, exploded-view drawings, installation instructions, and other vital material that helps professionals execute the most comprehensive job possible.

Better Planning 

Bill of material gives a detailed inventory of what is required to accomplish a project. It provides you with all the data you need to estimate how long a project will take and how much human resources will be involved. Complete BOMs may instill trust in your maintenance staff, allowing them to fix more equipment in-house and lowering repair expenses.

Better Pricing and Costing

Better planning gives your company a more accurate idea of how long a task will take. It enables your sales staff to cost tasks and orders more effectively and gives an accurate view of COGs, giving you greater control over your company’s profit margins. It’s usually a good idea to involve part of the sales staff in formulating the BoM. Multiple teams across the firm may examine and approve production task details using inventory management technology.

Unites all Departments

The proper inventory software system guarantees that all departments collaborate. To ensure the document’s accuracy, you must include input from the design, production, procurement, and sales teams while establishing a BoM. Furthermore, the Bill of material construction process builds supplier connections and supports standardization, updates, and OEM commercialization.

What’s in a Bill Of Material? Parts?

BOM Level

This is a distinct number that indicates where each part or assembly falls in the BOM hierarchy. Consider a vehicle’s bill of materials.

Part Number

This unique number identifies a material or component, allowing anybody engaged in the manufacturing process to immediately identify it.

Part Name

 The part name, like the component number, is a unique identifier for each part or assembly and aids users in easily identifying the part.


The phase of each part’s lifespan is indicated by the phase. “In production” or “in design” are two examples.


This is unique to each part or component and contains more information than the part name or number.


It specifies how many parts will be utilized in an assembly or sub-assembly.

Unit Measure

Specifies the unit of measurement in which a part will be purchased and utilized.

Procurement Type

The kind of procurement reveals how the item or component was procured.

BOM Notes

The notes section allows you to enter additional information that will be valuable to anyone who refers to the BOM.

How to Design a Bill of Material?

1. Choose a bill of material size.

2. Determine the parts or elements to be included.

3. Select a bill of material template.

4. Organize the data.

5. Make the necessary changes.

6. Finalize.

Bill of Material vs. Purchase Order

A bill of materials is a complete and detailed inventory of the raw materials, components, and instructions needed to construct, produce, or repair a specific product or service.

A purchase order, on the other hand, is a legal document showing a company’s desire to acquire or obtain materials or services.

What’s the Difference Between the Bill Of Materials, Cost Estimate, and Price List?

A bill of materials is a detailed description of the raw materials, components, and instructions needed to manufacture, produce, or maintain a product or service.

A cost estimate is a quote that provides the value of the costs paid in the manufacture of completed goods and aids in determining the selling price of the final product after charging suitable overheads and allowing for a specified profit margin.

A price list is a declaration or list of current prices that allows you to create a specific pricing set and make it unique to a single consumer.

Bill of Material Sizes

Below are the common bill of material sizes that you can use in creating, editing, and formatting BOM elements. These are standard bill of materials sizes and other types of sizes.

  • Letter  (8.5” x 11”)
  • A4 (8.3” x 11.7”)
  • Bill Of Material Sizes for Print
  • Bill Of Material Sizes for ms word
  • Bill Of Material Sizes for Apple pages
  • Bill Of Material Sizes for google docs

Bill of Material Ideas & Examples

Listed below are some useful and common ideas and examples of bill of materials. Try to take a look at all of these BOM ideas; it can be a great help:

  • Engineering Bill Of Material Ideas and Examples
  • Architecture Bill Of Material Ideas and Examples
  • Support Bill Of Material Ideas and Examples
  • Cybersecurity Bill Of Material Ideas and Examples
  • Automotive Bill Of Material Ideas and Examples
  • Apparel Bill Of Material Ideas and Examples
  • Design Bill Of Material Ideas and Examples
  • Electrical Bill Of Material Ideas and Examples
  • Furniture Bill Of Material Ideas and Examples
  • Mechanical Bill Of Material Ideas and Examples
  • Multi-Level Bill Of Material Ideas and Examples


What is a software bill of materials?

A bill of materials in software or SBOM is a layered inventory or a list of the items that go into making software components.

What is a Bill of Materials in PCB Design?

In the case of printed circuit board design, the bill of materials is a list of all the elements required in the manufacturing process to construct that specific printed circuit board.

How do I edit the Bill of Materials?

After the production order has been created/committed, the bill of materials cannot be modified.

What Materials to Include in Your Bill of Materials?

The following parts are often included in a bill of materials: the BOM level; the part number, name, description, and quantity; the cost; and the unit of measure.

Why Do Manufacturers Need a Bill of Materials?

Creating an accurate bill of materials is critical because it guarantees that parts are accessible when needed and that the assembly process is as efficient as feasible.

What is the Bill of Material in material management?

A bill of materials in material management is a detailed inventory of the raw materials, assemblies, subassemblies, parts, and components required to create a product and the quantities of each.

How do you maintain a bill of materials?

Ponder about which tool will be used to create the BOM, determine which items should be included on the BOM, determine what information to include on the BOM, gather asset information, examine asset data, and enter the data.

How can I increase my accuracy in a bill of materials?

You can use a check method or engineering change notices (ECN) or design change notices (DCN) with a 24-hour turnaround time.

Why Your Bill of Materials is as Critical as Your Design Data?

Your Bill of Materials serves as the one source of truth amongst various systems and stakeholders, from engineering to production to sales and service, and determines the product’s final word.

How can you limit the validity of a bill of material (BOM)?

When you update a BOM item, such as replacing one material with another, you may indicate when the change takes effect by setting a validity period.