Decide what this sample must answer
An unprinted mock-up checks dimensions, assembly, opening, and filling; a content proof checks copy, barcode position, and layout; a production-like printed sample helps assess material, color, and surface effects. Agree the purpose and limits of the sample before ordering it.
Prioritize the risks: confirm structure first when dimensions affect filling, and arrange the appropriate physical review when brand color or small text is critical. Do not use a low-fidelity sample to approve color or finishing that it cannot represent.
Approve with a checklist and sign-off record
At minimum, the checklist should cover revision, dimensions, material, artwork content, critical colors, folds, glue areas, windows, surface treatment, and filling actions. Assign review areas to brand, design, procurement, and production so no one assumes another person checked them.
Feedback should identify the exact location, problem, and requested direction, then be consolidated into one revision. The approval record should name the file, sample identifier, date, approver, and any conditions; verbal decisions should also be added afterward.
Turn the approved sample into a production reference
Before production, verify that the final artwork, dieline, paper, and processes match the approval record, and agree the priority checks for the first run. If a change affects dimensions, material, color, or finishing, return to the relevant approval level.
Keep one well-preserved approved sample and the full change record for comparison during first-piece review, delivery, and repeat orders. It is a shared reference rather than an absolute guarantee for every run; acceptable ranges still need project-specific agreement.
Bring these ideas into your next project.
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