Why Change Management and Revision is Required in BOM


This subject looks to be so straightforward that you’d think firms would have worked it out by now. Unfortunately, it’s not that simple and constantly asked how to handle product (BOM) and item (Assemblies and Parts) change management. We need to understand the relevance of change management and revision in BOMs.

Do you have any particular ideas on what should and should not trigger a BOM revision? Companies frequently struggle with this definition.

“Don’t modify the whole house when you revise the floor,” It tells you all you need to know.  If you revise upper-level assemblies every time you make component adjustments, you’ll never be able to keep up with the changes and will become exhausted.

A bill of materials (BOM) is a comprehensive description of all the raw materials, components, and instructions. Which is required to design, manufacture, or repair a product or service. The finished product is usually at the top of a bill of materials, with numerous components and supplies towards the bottom.

There are various kinds of bills of materials for engineering used in the design phase (BOM), as well as for manufacturing (MBOM) used in the assembly process.

Important Takeaways:-

  • A bill of materials (BOM) is a standardized source of information that includes a list of products utilized in the production of a product as well as for instructions.

  • A bill of materials (BOM) lists the finished product at the top and gradually moves down to individual components and materials.

  • Bills of materials (BOMs) can be displayed as an explosion or an implosion.

  • Manufacturing bills of materials (BOMs) and engineering bills of materials (BOMs) are the two basic forms of BOMs.

Types of Bills of Materials (BOMs):-

  1. The engineering bill of materials determines the design of the finished product. The product code, part name, part number, part revision, description, quantity, unit of measure, size, length, weight, and specifications or characteristics of the product are all listed on each line of the bill of materials (BOM). Engineers frequently arrange the engineering BOM using a computer-aided design (CAD) drawing. There may be several engineering BOMs developed for a final product. This is an element of Product lifecycle management (PLM).

  2. The manufacturing bill of materials(MBOM) describes all of the assemblies and parts that go into making a finished product that can be transported. It also includes the materials required to send the product to the client in its packaging. It comprises operations that must be performed on the product before it can be finished.

One of the most important aspects of product lifecycle management (PLM) is change management and revision. It’s all about transitions, in a nutshell. When you make modifications, you’d like the system to keep track of them and allow you to distinguish between various revisions.

Engineering changes, often known as engineering change orders (ECOs), are used in manufacturing companies to maintain revision control. Manufacturing companies can use revision control to track the progress of a product and to support or service the specific revision that is provided to the customers.

Here are two easy guidelines to keep in mind:

  1. Do not release a new revision of the parent assembly if the update is only a small change to the component.

  2.   Decide if the change is a major revision to the parent assembly if the change is a major update to the component. If it does, make a new revision of the parent and release it.

In the Bill of Materials, some considerations on revision management. Rather than focusing on individual PLM or ERP system implementation, my aim is to provide you with a general understanding of revision management.

Revisions to new components– The revision of a component will modify as the design progresses or as revisions occur. There are several methods for handling changes, some of which include major and minor classification. Many use the FFF (form, fit, and function) method. Any method you use, you’ll end up with a collection of component (item) revisions.


The assembly has undergone a significant revision- This is one of the most important questions you must address. Despite its simplicity, this topic encompasses a wide range of activities. If you do it all the time, you’ll be inundated with modifications and documentation updates. If you don’t, you risk missing a crucial update, resulting in incompatibility, errors, and delays.

Is it better to update the upper assembly revision or not? The rule is based on the FFF standards. And it demands you to distinguish between the two assemblies by employing components before and after. If the difference does not affect the top assembly’s Form, Fit, or Function, you should not roll back the revision. If this is the case, the assembly will be revised. 


Final Thoughts on Revisions and Change Management in BOM

If there are significant modifications that affect form, fit, or function, you’ll need to re-identify the impacted components, as well as the utilizing assemblies, if they are not backward and forwards compatible. Minor modifications, on the other hand, maybe documented easily by rolling parts revisions and utilizing assemblies.

Furthermore, PLM solutions were created to track and manage all parts and assemblies from conception to end of life. Any modifications to a part are automatically updated in the BOM. Thus guaranteeing that every aspect of the product is tracked and recorded for each revision.

As a result of the KloudPLM system serving as a source of trust, product teams can better notice changes of any sort, at any time, to enhance change management and engineering revision control. Schedule a demo right now to get started on your journey.


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