What does ECN stand for in product development?

• A. Engineering Change Number
• B. Engineering Change Notice
• C. Electronic Communications Network
• D. Engineering Confirmation Note

Answer: (B)

ECN in product development refers to a formal document that captures and controls changes to a product’s design, bill of materials, or manufacturing process. It serves as the official notice that a modification is proposed and must go through review, approval, and scheduling before implementation. The ECN details what changes are needed, why they’re required, which parts or processes are affected, and the anticipated impact on cost, schedule, and quality, along with the actions required to execute the change. This process maintains traceability and ensures changes are communicated and executed in a controlled way across engineering, purchasing, and manufacturing. The other terms don’t fit because they describe either an identifier (a change number), something outside product development (a telecom network), or an uncommon, non-standard term.