Design Revision and Site Change Control

A single issue register

• —The document reference, title and discipline.
• —The revision number, date and purpose of issue.
• —Recipients and confirmation of transmission.
• —The status of the previous revision and the rule for withdrawing it from use.

Technical query workflow

1. Record the question, location and reference to the design documentation.
2. Assess the impact on safety, cost, programme and interfacing design decisions.
3. Assign an owner for the response and a control date.
4. Issue a formal response or a new document revision.
5. Confirm that the site team received the decision and close the query.

Change control

• —Distinguish a request for information from a proposal to change the design.
• —Do not allow work to proceed from a draft decision without a defined status.
• —Link every change to its basis, approval and affected documents.
• —Preserve the history so the applicable decision can be reconstructed for any given date.

What the design team gains

A controlled revision and query system reduces the risk of building from superseded drawings, makes accountability transparent and turns changes from an email chain into a managed process.