Answer: Alert the vendor to the defect and have them remake all the parts. This will delay delivery, but will ensure the parts are not defective
Explanation: Since the sample box is representative of all the boxes and contain the same products or parts, it is safe ti assume that a substantial number of other parts are equally defective. Using the defective products in a bid to meet the deadline would be a grave error in judgement as this will compromise the quality of services rendered and may eventually result in huge capital loss when he comes liable for the damage due to the defective parts.
On the other hand, if the parts are remade, it would only delay delivery and push the deadline forward but the quality of the parts will be assured and the defects would have been corrected.