Assemble it as you would in use
Fold, assemble and open the sample fully. Check tabs, folds and closures, then load the actual product to assess clearance and ease of access.
Check carrying and presentation
Try the handles and base under conditions close to actual use. Check balance and structural stability. For display packaging, check visibility through clear areas and whether artwork obscures the product.
Record the changes you need
Photograph and mark the areas needing adjustment, then discuss dimensions, structure and print changes together. Sample testing helps confirm requirements but does not replace formal quality inspection.