Change control — After a drawing is formally released, is an Engineering Change Order (ECO) the standard mechanism used to document, review, approve, and implement drawing changes?

Introduction / Context:
Released drawings are controlled documents. Any modification must be traceable so downstream functions—manufacturing, purchasing, quality—work from the same source of truth. The Engineering Change Order (ECO) process is the industry-standard framework for governing these updates.

Given Data / Assumptions:

• Claim: ECOs are used to document and approve drawing changes after release.
• Scope: drawing corrections, design improvements, supplier updates, part substitutions.
• Artifacts: change description, impact analysis, approvals, and revision updates.

Concept / Approach:
An ECO captures what changes, why it changes, affected items, and the planned effectivity. Workflows route the ECO for review across stakeholders, and upon approval the drawing revision is updated; new revisions are distributed via EDMS/PLM. Even urgent changes follow documented expedited ECO paths to maintain traceability.

Step-by-Step Solution:
1) Confirm the drawing is released and under revision control.2) Initiate an ECO with a clear problem statement or improvement rationale.3) Conduct impact analysis (parts, tooling, inventory, documentation).4) Route for approvals; implement and release the new revision with updated records.

Verification / Alternative check:
Audits and customer requirements expect a complete change history; ECOs provide the chain of custody for every revision from initial release to current state.

Why Other Options Are Wrong:

• Incorrect: Contradicts standard configuration management practice.
• Dimensional only: Changes to materials, notes, or finishes also require ECOs.
• Only before release: Change control begins at release and continues afterward.
• Optional for urgent: Expedite, but still document via ECO to preserve traceability.

Common Pitfalls:
Implementing “silent” shop-floor changes; updating CAD without synchronizing drawings and BOM; failing to update effectivity dates and notify stakeholders.

Final Answer:
Correct