Which statement correctly defines ECO and ECR?

Which statement correctly defines ECO and ECR?

• A. ECO is Engineering Change Order/Control (approval and implementation); ECR is Engineering Change Request (proposal)
• B. ECR is Engineering Change Order; ECO is Engineering Change Request
• C. ECO is Economic Change Order; ECR is Engineering Change Request
• D. ECO and ECR are identical terms used interchangeably

Answer: (A)

This tests understanding of the lifecycle difference between a change proposal and the authorization to implement that change in engineering change management. An Engineering Change Request is the formal proposal to alter a design, process, or document. It lays out the problem, the suggested solution, and the potential impacts, and it must go through review and approval before any work begins. An Engineering Change Order is the authorization to carry out the change, encompassing the actual implementation, release of revised drawings or documents, updates to parts or processes, and the required controls and timing once approvals are in place. The correct statement matches this sequence: ECO is Engineering Change Order/Control (approval and implementation), and ECR is Engineering Change Request (proposal). This aligns with how changes are managed in practice—first you request and justify the change, then you approve and implement it. The other descriptions mix up the roles (for example, treating ECO as an economic term or confusing ECR with the actual change), which doesn’t reflect how change processes are structured. For example, after identifying a problem, you would submit an ECR as the proposal; after approval, you issue an ECO to execute the change.

This tests understanding of the lifecycle difference between a change proposal and the authorization to implement that change in engineering change management. An Engineering Change Request is the formal proposal to alter a design, process, or document. It lays out the problem, the suggested solution, and the potential impacts, and it must go through review and approval before any work begins. An Engineering Change Order is the authorization to carry out the change, encompassing the actual implementation, release of revised drawings or documents, updates to parts or processes, and the required controls and timing once approvals are in place.

The correct statement matches this sequence: ECO is Engineering Change Order/Control (approval and implementation), and ECR is Engineering Change Request (proposal). This aligns with how changes are managed in practice—first you request and justify the change, then you approve and implement it. The other descriptions mix up the roles (for example, treating ECO as an economic term or confusing ECR with the actual change), which doesn’t reflect how change processes are structured. For example, after identifying a problem, you would submit an ECR as the proposal; after approval, you issue an ECO to execute the change.