A new revision simply means the product has been changed. The change can be from the material, design, or even test method. However, no matter what are the changes, you may want to document them, because they will affect manufacturing, assembling, and future product support.
What is ECN?
ECN is the abbreviation of Engineering Change Notice. It is an efficient way to communicate between engineering and manufacturing about the product revision change. ECN describe the design change engineering made on a specific part and tell the manufacturing, procurement, and project management team how the change will affect their work.
How to apply ECN in Product Revision Control?
Engineering may revise a design for various reasons, the most common reasons are design improvement and manufacturing feedback. The ECN release steps are like below:
First an Engineering Change Request (ECR) will be raised to engineering department.
Then after research and discussion, engineering will decided if this change is necessary.
If the change is necessary, engineering will execute the change.
The design revision will be sent out to cross-functional team through Engineering Change Notice. And instruct what action is required from each team.
What will be in an engineering change notice?
An ECN shall describe what change engineering has made on the new revision design. An ECN impact report shall be attached to the ECN to help project management team understand which parts/projects will be affected.
The ECN shall also specify if rework is required for finished parts or parts under manufacturing. If the new revision design only apply to future production part, no effort is required from manufacturing team.
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Great post. I am going through many of these issues as well..