the vital role of ECNs and revision control systems in Electronic product manufacturing

ECNs and Electronic Product Manufacturing

In the dynamic world of electronic product manufacturing, efficiency, precision, and adaptability are paramount. To meet these demands, engineers and manufacturers employ a range of tools and processes to ensure the highest quality and functionality of their products. One such indispensable tool is the Engineering Change Note (ECN), a document that plays a pivotal role in ensuring smooth operations and product excellence in the industry. In this blog, we will delve into the importance of using ECNs in electronic product manufacturing and highlight the key distinctions between ECNs and revision control systems.

Understanding Engineering Change Notes (ECNs)

Engineering Change Notes, or ECNs, are formal documents that record and authorise changes to an electronic product’s design, components, or manufacturing processes. These changes can arise from a variety of sources, including design improvements, component substitutions, cost optimisations, or issues discovered during the manufacturing process. ECNs serve as the central communication tool between design authorities, engineering teams, production departments, and quality control, ensuring that changes are implemented correctly and efficiently.

The Importance of ECNs in Electronic Product Manufacturing

1. Traceability and Accountability: ECNs provide a clear and traceable record of all changes made to a product. This ensures that every modification is well-documented, and responsibility is assigned to the appropriate individuals or teams. In case of issues or defects, it’s easier to identify the source and rectify the problem.

2. Quality Control: ECNs play a critical role in maintaining product quality. They specify the exact changes to be made and the reasons behind them. This information guides the manufacturing process, ensuring that the final product meets the desired standards.

3. Efficiency: Without ECNs, changes can be chaotic and prone to miscommunication. ECNs streamline the process, ensuring that everyone involved is on the same page. This minimises the chances of errors, rework, or delays.

4. Cost Management: By documenting the reasons for changes, ECNs also allow for cost analysis. This information can help manufacturers make informed decisions about whether a change is cost-effective or not. An ECN can also help management understand the true costs of engineering changes with regard to scrapping of now defunct raw materials, possible rework costs, test fixture updates etc.

5. Regulatory Compliance: In industries with strict regulatory requirements, such as aerospace or medical devices, ECNs are essential for demonstrating compliance with industry standards and regulations. Some ECN’s may be significant enough to trigger a re-certification event, such as electrical safety for example.

ECNs vs. Revision Control Systems

While both ECNs and revision control systems play critical roles in electronic product manufacturing, they serve different purposes:

ECNs (Engineeering Change Notes):

  • ECNs are documents that specifically address and detail changes made to a product’s design, components, or manufacturing processes.
  • They focus on the “what,” “why,” and “how” of a change, providing comprehensive information about the alteration.
  • ECNs are used for change authorisation and communication between engineering and manufacturing teams.


 Revision Control Systems:

  • These systems manage and track the various versions or revisions of a product’s design documents, including CAD files, schematics, and software code.
  • They focus on the “when” and “who” aspects of changes, keeping track of who made revisions and when they were made.
  • Revision control systems help maintain a historical record of design changes and ensure that the correct version of design documents is used in manufacturing.

In summary, while revision control systems manage the evolution of design documents, ECNs are used to control and communicate changes made to the product itself. Both are essential tools, working together to ensure the integrity of the manufacturing process.

In the fast-paced world of electronic product manufacturing, the importance of Engineering Change Notes cannot be overstated. They are the glue that holds design, engineering, and manufacturing teams together, ensuring that changes are implemented smoothly, efficiently, and in a way that upholds the highest standards of quality and performance. By utilising ECNs alongside revision control systems, manufacturers can navigate the ever-changing landscape of electronic product design and production with confidence and precision.

ECN’s and revision control systems should be discussed with your electronics manufacturer at the outset of a new venture together.

Entech Electronics welcomes you to reach out and discuss your new project and how we can work effectively together with these two robust design and manufacturing concepts.

Find out more about Entech Electronics or Get In Touch 

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Entech Electronics

Entech Electronics

Australian owned contract manufacturing.
Manufacturing in South Australia since 1986, Entech Electronics specialises in the contract manufacturing of electronic products and complex sub-assemblies.

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