How to Identify the Drawing Revision in a Supplier Offer

When a buyer sends a drawing, “we can make it” is not yet a controlled offer. The supplier needs to identify the drawing number, revision, date received and any related 3D model or specification. If those files disagree, stop and ask which one governs before promising a price or delivery date.

Make the revision visible

Reference the drawing in the RFQ log and repeat it in the quote. Record all pages and attachments received. A marked-up copy is useful for questions, but the final agreed drawing should be stored without ambiguous handwritten changes. If the buyer sends a newer revision after the quote, compare dimensions, material, finish and inspection points against the earlier version. Do not assume the change is cosmetic.

The practical handoff is a short change note: old revision, new revision, affected operations, effect on tooling or material, and whether the quote needs reissue. Production should receive the accepted version only after commercial and engineering owners agree.

For a sanity check, ask the machinist or production planner which revision they would build tomorrow. If their answer differs from the one cited in the quotation, the document controls have failed before any part was made.

Worked example (illustrative)

Suppose the buyer sends drawing B by email after the factory priced drawing A. The RFQ owner records both files, highlights the changed hole position, and asks engineering whether tooling and inspection change. Only then does the team issue a revised quote explicitly tied to B; it does not quietly replace the drawing behind the old price.

Source check

Checked 2026-09-28. NIST product-data specification defines a drawing revision identifier as identifying a particular version of a drawing. The linked source supports this point only. The steps and worked example above are editorial guidance; they do not establish any supplier’s capability or guarantee a buyer response, order or delivery.

Evidence and use boundary

Editorial method reviewed: 2026-09-27. This article is an operational checklist, not a report of current market conditions or a claim about any particular factory, buyer, certification or delivery result. Check the current product and transaction records before acting.