RFQ Guide: Accurate Quotes from a Binh Duong Workshop
If you send a vague email and a photo to a Binh Duong workshop, you will get a vague price back, or none at all. The quote you receive is only as good as the information you provide. This article shows you exactly what to send so you get accurate pricing within days, not weeks, and avoid the surprise charges that appear after production starts.
Why quotes come back wrong or slow
A workshop prices your part by estimating material, machine time, setup, tooling, finishing, and handling. When any of these is unclear, the engineer must either guess or ask questions. Guessing inflates the price to cover risk. Asking questions adds days of back-and-forth. Most delays and quote errors trace back to missing information, not to a slow supplier.
The five things every quote needs
- A clear drawing or 3D file. STEP or IGES for machined parts, DXF for flat sheet metal, plus a PDF with dimensions and tolerances.
- Material specification. Name the grade, not just “steel” or “aluminum”. SS304 and SS201 look identical but differ in price and corrosion resistance.
- Quantity and repeat plan. A one-off prototype and a monthly batch of 500 are priced very differently. Say which you need.
- Tolerances that matter. Mark only the critical dimensions tightly. Blanket tight tolerances raise cost with no benefit.
- Finish and delivery expectations. Anodizing, powder coating, deburring, target date, and packaging all affect the number.
Tolerances: where money hides
This is the single biggest driver of cost that buyers overlook. A general tolerance of plus or minus 0.1 mm is easy. Demanding plus or minus 0.01 mm across a whole part can double machine time and reject rate. Decide which features actually mate with other parts or seal, and tighten only those. Leave the rest at a general tolerance note. A good workshop will respect this and price accordingly.
A real scenario
A furniture brand in Thuan An needed 300 aluminum brackets. Their first RFQ was one phone photo and “how much?”. Three workshops gave prices ranging from 45,000 to 120,000 VND per piece, because each guessed at material and finish. The buyer then sent a proper package: a STEP file, material set as 6063-T5, a 20-micron anodize finish, general tolerance plus or minus 0.15 mm with two holes at plus or minus 0.05 mm, and a 500-piece annual estimate. The same three workshops came back within two days, all within a 15 percent band. The buyer negotiated from real numbers instead of guesses.
Common mistakes and how to fix them
- Sending only a picture. Fix: always include an editable CAD file or at least a fully dimensioned drawing.
- Leaving material generic. Fix: specify the exact grade; ask the workshop to suggest one if you are unsure.
- Over-tightening every tolerance. Fix: mark critical dimensions only and add a general tolerance note for the rest.
- Hiding the real quantity. Fix: state prototype versus production; volume changes the process and the price.
- Ignoring finishing and packaging. Fix: state the finish, deburring level, and how parts must arrive so nothing is added later.
Your RFQ checklist
- Attach STEP or IGES (machined) or DXF (sheet metal), plus a dimensioned PDF.
- State exact material grade and temper.
- Give order quantity and any repeat schedule.
- Highlight only the critical tolerances.
- Specify surface finish, deburring, and any coating.
- Note the target delivery date and packaging needs.
- Ask for a unit price, tooling or setup cost, and lead time separately.
Send this to two or three workshops at once. Comparable inputs produce comparable quotes, which is the only fair way to compare suppliers.
Conclusion and next step
An accurate quote is a byproduct of a complete RFQ. Build the package above once, save it as a template, and reuse it for every part. Your next step: take your current drawing, run it against the checklist, fill any gap, and send it to three workshops the same day.
FAQ
How long should an accurate quote take?
With a complete package, most Binh Duong workshops reply in one to three working days for standard parts. Complex assemblies or unusual materials can take longer.
Should I share my budget with the workshop?
You do not need to. Sharing a target price can help align expectations, but a complete RFQ already gives the workshop everything it needs to price fairly.
What if I only have a physical sample, not a drawing?
Many workshops can reverse-engineer or measure a sample, but expect an extra fee and lead time. A CAD file always produces a faster, cheaper quote.
Why do prices differ so much between workshops?
Different machines, utilization, and overheads produce different costs. Wide gaps usually mean the RFQ was unclear and suppliers guessed differently. Standardize your inputs and the gap narrows.