Pair assets with briefs, check versions, carry revision notes. Every one is ready to run, and you can adjust it in plain language.
Record approval decisions against specific proof revisions.
Keep a clear history of who approved or rejected each campaign proof, even when the review board status changes later.
Keep the replaced file and earlier sign-off linked to the new review.
Your delivery manager gets a fresh review when a client deliverable changes after sign-off, with the earlier decision linked and the handoff held.