A lower unit price is only meaningful when the specification, obligations and exclusions are comparable.
Freeze the comparison baseline
Record the drawing revision, material grade, finish, packaging, test requirements, currency and quantity assumptions. A quotation without a specification reference is a discussion, not a dependable cost baseline. Keep the original offer and a dated clarification log.
Separate recurring and one-time costs
Identify tooling ownership, development charges, samples, testing and packaging setup. Ask whether these are included in the unit price or billed separately. Check the agreed delivery term, payment schedule, quote validity and the point where responsibility transfers. Do not treat a freight estimate as a committed landed cost.
Investigate differences before negotiating
A price gap can reflect a different process, omitted inspection, lower material grade or a genuine efficiency. Request an explanation supported by the bill of materials or manufacturing assumptions. The decision pack should state what is comparable, what remains uncertain and who must resolve each gap.
Make the award decision explicit
Compare commercial viability alongside capacity, quality controls and compliance exposure. Record why the supplier was selected, which conditions precede a deposit and what would trigger a review. A quote audit informs a decision; it does not promise a saving.