An Engineering Change Order (ECO) is one of the documents which allows a manufacturer to control changes. If a change is necessary, an Engineering Change Request (ECR) is created. This forms the basis of analysis of the feasibility and effects of the change.
The decision whether to go ahead with the change uses these results and needs approval by all affected departments. change. When approved, the ECR is converted into an ECO, which will define the changes, and when they will take place.