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How to Compare Bill of Materials in Excel


A bill of materials is more than just a list of parts. It’s a vital tool for managing production and avoiding costly delays and waste. It’s used by professionals in engineering, design, operational planning and manufacturing.

BOM Compare automatically checks two different bills of materials from different project revisions using item numbers (part positions). This is a fully automated process.


A bill of materials (BOM) is a list that includes all of the raw materials, components and parts needed to make a product. It can include the part number, description and quantity; material types; unit of measure; and pricing. A BOM also contains information about where the raw materials, components and parts are procured from.

It’s a good idea to use the same unit of measurement for all items in a BOM. This will reduce confusion and errors. For example, you should always include the specific units used for glue and other consumables in your BOM. This will make it easier to find the right amount of glue and other materials when assembling the finished products.

PDXpert software can manage bills of materials and export them as Microsoft Excel spreadsheets. The program compares similar bills of materials by comparing item numbers in each list. This method is fully automated and can save a significant amount of time. The program can even handle a large number of BOMs and BOM revisions.

A good BOM template can help companies plan production, estimate costs and track inventory. It can help minimize production delays and waste, and streamline operations. In addition, it can improve the quality of end-products and minimize manufacturing and outsourcing expenses. BOMs are commonly used by professionals in engineering, design, operational planning and manufacturing.


Manufacturers rely on the information that is stored in a bill of materials (BOM). It contains the components and their quantity required to build an assembly. These BOMs can be complex and involve a lot of data. To manage what can be a tremendous amount of information, companies use spreadsheets or dedicated BOM management systems like Arena Product Lifecycle Management.

BOMs often contain multiple revisions, which are based on different versions of the same assembly or design. When comparing these bills of materials, it’s important to be able to see what changes have been made and to identify which component parts are used. This can be done with compare BOM software that compares raw data from Excel tables and identifies matches on the basis of item numbers. This tool compares two files and displays them side by side to make it easier for engineers to identify differences.

Managing BOMs in spreadsheets makes it difficult to ensure that all team members are using the same version of a document. This can lead to errors in product designs and supply chain confusion. Using BOM software with built-in relationships between parts and assemblies reduces these problems and saves time.

PDXpert software is a powerful BOM management solution. It can manage multiple bills of materials and export them as Microsoft Excel files. It also supports the comparison of these files, highlighting differences between assemblies. It can also connect to component sourcing databases to provide information on approved manufacturers and suppliers. This can help teams assess and confirm that components comply with environmental standards such as RoHS and REACH.


A component is a piece, raw material, or sub-assembly that is required to make or assemble an item. A BOM lists the components needed for a product or assembly, including part numbers, descriptions, and quantities. The BOM is normally displayed in table format with each row representing one component. The BOM may also be sorted by component number or quantity and filtered by category, such as supplier or part type.

A bill of materials (BOM) is an essential document used for tracking inventories, evaluating costs, and organizing production planning. Excel offers accessibility, flexibility, calculating abilities, and collaborative tools for efficiently managing a BOM. However, it does have some limitations for more complex procedures.

Using spreadsheets to manage a product BOM is an option for smaller companies. However, these systems can lead to inconsistencies and confusion across internal teams and supply chain partners. This is because BOM files are often duplicated across server folders and email inboxes.

Sierra Circuits’ BOM Compare Tool helps identify differences between two different revisions of a PCB design in a matter of minutes. The web app automatically compares the BOM files and highlights newly added, deleted, or modified data in different colors. The tool also shows the relationship between parts and the assemblies they’re used in. With this feature, you can easily assess whether the revised component will meet your design requirements and quoting specifications.


When creating a bill of materials, it’s important to consider the unit cost for each component. This can help you identify the lowest-cost components or subassemblies. It can also help you identify waste and avoid production delays due to shortages of raw materials. In addition, the bill of materials will provide you with a good starting point for determining your overall assembly costs.

Using the BOM Compare tool in the PDXpert software, you can quickly compare two bills of materials from different project revisions. The comparison process is fully automated and uses the item number (part position) to check for duplicates. In addition, it can detect whether a particular part has been added or deleted.

In addition, the comparison feature can be used to create a report of changes made in a specific BOM. This report can be shared with the quoting team to ensure that the BOM contains complete and accurate information. The compared data is displayed on the right side of the screen and colored to indicate newly added or deleted items.

The free BOM Compare Template from Mouser can help you keep your quoting and purchasing processes in line. It allows you to import your BOM files and convert them into an industry-leading parts research and ordering platform. You can select your preferences and specify which columns to map to each other. The tool will then display the matching results in a side-by-side comparison.