What is the primary purpose of an engineering change notice (ECN)?

The primary purpose of an engineering change notice (ECN) is to notify changes to a product drawing. An ECN serves as an official communication tool within engineering and production teams to inform stakeholders about modifications that need to be made to designs, specifications, materials, or other key aspects of a product. This ensures that everyone involved in the manufacturing and development process is aware of the latest changes, which is crucial for maintaining consistency and quality in production. Proper utilization of ECNs helps prevent errors and miscommunication, thereby enhancing efficiency and product integrity.

The other options pertain to different organizational functions. Quality audits, documentation of production processes, and outlining employee performance standards are important in their own right but are separate processes from the role of an ECN, which is specifically focused on communicating design-related changes.