RFQ to vendor workflow: from drawing pack to awarded job, without the email chaos

Every sourcing engineer I know has the same nightmare: a part drawing sent to eight vendors over WhatsApp and email, three of them quoting against an old revision, two who never confirmed they received it, and a final comparison built by hand in a spreadsheet at 11 pm. The RFQ to vendor workflow is where good parts get delayed and margins quietly leak away.

A clean request-for-quotation process is not paperwork for its own sake. It is the difference between awarding a job in three days with a defensible paper trail and chasing quotes for three weeks with no idea who saw what. This guide lays out the workflow I have used to source machined and fabricated parts across automotive and general-engineering plants, and where a secure online RFQ system removes the manual friction.

What an RFQ to vendor workflow actually involves

An RFQ is a structured request asking suppliers to price a defined scope of work. Unlike a purchase order, it commits no one — it gathers comparable quotes so you can award on real numbers. A complete workflow runs through six stages: define the scope, package the technical data, distribute to a vendor shortlist, collect quotes in a comparable format, evaluate, and award. Skip any stage and the cost shows up later as a rejected lot or a dispute over what was agreed.

The core problem is comparability. If vendor A quotes for 500 pieces with material included and vendor B quotes for 500 pieces ex-material, the lower number can be the worse deal. A disciplined workflow forces every vendor to quote against the same drawing revision, the same quantity breaks, and the same terms.

Step 1: Lock the technical package before you send anything

The single biggest cause of bad quotes is an incomplete or ambiguous drawing pack. Before an RFQ goes out, the package should contain the released drawing at the correct revision, the 3D model where relevant, the quantity breaks you want priced, and any inspection or certification requirements (material certs, FAI, PPAP level).

This is where viewing and verifying the model first pays off. Open the STEP or IGES file, confirm the geometry matches the drawing, and pull a quick bill of materials so you know exactly what you are sourcing. CadNexa's STEP file BOM export turns the 3D model into a parts-and-quantities list in the browser, so the RFQ scope is grounded in the actual geometry rather than a manual count.

Step 2: Define the quote format so answers are comparable

Tell vendors exactly what to quote. A good RFQ specifies the line items you want priced and the structure you want them returned in. At minimum, ask every supplier for the same fields:

Step 3: Distribute securely — not over WhatsApp

Drawings are intellectual property. Forwarding a PDF over a messaging app means you lose all control: it can be re-shared, you cannot revoke it, and you have no record of who opened it. For commodity parts the risk is low; for anything proprietary it is a real exposure.

A secure RFQ link solves this. CadNexa's secure RFQ system generates a signed URL for each vendor that you can password-protect and set to expire, with an audit trail showing who opened the package and when. If a supplier drops out of the running, you revoke their link. The drawing never leaves a controlled environment, and you get delivery confirmation instead of a silent inbox.

Step 4: Collect quotes in one place

Email replies scatter quotes across threads. A structured system lets vendors submit their numbers against your defined fields, so the quotes arrive already comparable. Instead of copy-pasting figures into a spreadsheet at midnight, you see unit price, tooling, lead time, and validity lined up vendor by vendor.

This is also where you catch the vendor who quoted the wrong quantity or missed a finishing operation. When every quote shares a format, the outlier is obvious.

Step 5: Evaluate on landed cost, not headline price

The lowest unit price rarely wins on a total-cost basis. Build the comparison on landed cost: unit price across the real order quantity, plus tooling amortised over that quantity, plus freight, plus the cost of risk (a new vendor with no track record carries more than an approved one). A worked example for a 500-piece bracket job:

Vendor B has the lowest unit price and the highest landed cost — the tooling charge spread over 500 pieces adds ₹36 each. On a 5,000-piece reorder, B becomes the cheapest. The right award depends on volume, which is exactly why quantity breaks belong in the RFQ.

Step 6: Award with a clear record

Awarding is not just picking a winner — it is closing the loop. Notify the chosen vendor, decline the others professionally (they will quote for you again), and keep the full record: who was invited, who quoted, what they quoted, and why the award was made. When procurement is audited or a price is later questioned, that trail is your defence.

Common RFQ workflow mistakes

• Ambiguous scope. Vague quantities or missing certification requirements produce quotes you cannot compare.
• Uncontrolled drawing distribution. Forwarding PDFs with no expiry or audit trail risks your IP and your revision control.
• Comparing headline price only. Ignoring tooling, freight, and lead time picks the wrong vendor.
• No quote validity. Accepting a three-month-old quote after a steel price rise invites a dispute.
• Silent rejections. Ghosting unsuccessful vendors shrinks your future quote pool.

How CadNexa fits the RFQ workflow

CadNexa covers the technical half of the workflow that generic procurement tools miss. You view and verify the STEP model, balloon the drawing for any inspection requirements, then share a controlled drawing package through a secure RFQ link with password protection, expiry, and an audit trail. Vendors submit quotes against your fields, and you award from a single comparison view. Tools like SourceDay or Zycus handle the wider procure-to-pay chain; CadNexa focuses on getting an accurate, secure drawing package in front of the right vendors fast.

Frequently asked questions about the RFQ to vendor workflow

What is the difference between an RFQ and an RFP?

An RFQ (request for quotation) asks vendors to price a defined, well-specified scope — you already know exactly what you want and need numbers. An RFP (request for proposal) asks vendors to propose how they would solve a less-defined problem, including approach and not just price. For machined or fabricated parts with a released drawing, you almost always want an RFQ.

How many vendors should I send an RFQ to?

Three to five is the practical sweet spot. Fewer than three gives you no real comparison; more than six creates evaluation overhead and signals to vendors that their odds are low, which lowers quote quality. Keep a shortlist of approved suppliers and rotate in one new vendor per RFQ to keep the pool fresh.

How do I share a CAD drawing with a vendor securely?

Use a signed, expiring link rather than an email attachment or messaging app. A secure RFQ system lets you password-protect the package, set an expiry date, see who opened it, and revoke access if a vendor drops out — so your drawing IP stays under control and every supplier sees the same revision.

Should I include price in the drawing package?

No. The RFQ package contains the technical scope — drawing, model, quantities, and quality requirements. Pricing flows the other way, from the vendor to you, in the quote. Keeping your target or budget price out of the package gets you honest market numbers.

How do I keep quotes comparable across vendors?

Define the quote format up front: unit price at each quantity break, tooling and setup separately, material basis stated, lead time, and validity period. When every vendor returns the same fields against the same drawing revision, comparison is direct and the outliers are obvious.