The Audit Before the Order: What Buyers Actually Look At
How a foreign machine builder assesses a Vietnamese fabricator before committing: capacity verification, quality records, communication and the trial order.
A machine builder deciding whether to place a base with a Vietnamese shop is making a decision with real exposure: a multi-tonne part, a long lead time, and no practical way to send it back. Understanding how that decision gets made tells you what to prepare.
Stage one: does the capability match the part
Before anything else, the buyer checks whether the physical facts fit. This is fast and it is where most shops are eliminated.
- Crane capacity, which sets maximum piece weight.
- Machining envelope: table size and travels against the part.
- Stress relief: in-house or subcontracted, and the furnace’s internal dimensions.
- Welding capability for the plate thicknesses involved.
- Inspection equipment owned versus subcontracted.
Give these as numbers with machine models. “Large capacity” eliminates you; “10 t overhead crane, floor-type borer 4000 x 2000 mm, in-house furnace to 6 m” does not.
Do not overstate. A shop that claimed in-house stress relief and turns out to subcontract it has not lost one capability point; it has made every other claim suspect. Understating and over-delivering is far safer.
Stage two: can you demonstrate control
The buyer moves from what you have to whether you can use it repeatably.
- Welding procedures and the qualification records behind them.
- Current welder certificates covering the processes and positions the part needs.
- Material traceability: how you show which plate went into which structure, and the EN 10204 certificate type you can supply.
- Inspection records from comparable work.
- Certifications held, and honesty about those not held.
- How non-conformances are handled and who decides.
This is where ISO 3834 enters. Where you do not hold it, the qualified-procedures-plus-inspection answer is credible and frequently accepted.
Stage three: the remote audit
On a first order the physical visit has largely been replaced by three cheaper things:
A video walkthrough. Often a live call where the buyer asks you to point the camera at specific machines, the furnace, the inspection area and work in progress. Prepare: know your own machine plate details, be ready to show the boring mill actually cutting, and do not hide the untidy corner. An honest shop floor is more convincing than a staged one.
Third-party audit. An inspection firm visits on the buyer’s behalf and reports against a checklist. Cooperate fully; obstruction at this stage is fatal.
Photographs of comparable work. Finished structures of similar size and class, ideally at several stages: fitted, welded, after stress relief, machined and crated. This is the most persuasive material most shops have and the most commonly neglected. Take photographs of every large job you finish, even when nobody asked.
Stage four: communication
This carries far more weight than shops expect, because it predicts what the next eight months will be like.
What the buyer is reading:
- Response time. Within one business day, consistently.
- Whether you asked questions. A shop that queried the datum scheme understood the drawing. A shop that quoted silently may not have read it.
- Whether bad news travels. A delay reported early is a manageable problem. The same delay discovered at the shipping date is a crisis and a lost customer.
- One named contact who stays on the account.
A buyer will accept a shop that is slightly more expensive and entirely predictable over one that is cheaper and goes quiet. On a part they cannot return, predictability is the product.
Stage five: the trial order
Most careful buyers start small: one unit, or a simpler structure than the one they eventually need.
Treat it as the real test, because it is. What they are measuring:
- Did the delivery date hold, and if not, were you the one who raised it?
- Did the part meet the drawing, checked against their own inspection?
- Were the documents complete and correct?
- Did the crate arrive intact with machined faces protected?
- How many variations appeared after the order?
That last one matters more than price. A shop whose quoted number is the number invoiced gets the second order.
What to prepare now
A single PDF, ready to send within an hour of an enquiry:
- Machine list with models, table sizes, travels and crane capacities.
- Stress relief capability with furnace dimensions.
- Inspection equipment, and what is subcontracted.
- Certifications held, stated accurately.
- Welder and procedure qualification summary.
- Photographs of five comparable finished structures, at several stages.
- Named contact, with an email address checked daily.
- Typical lead times by part class.
Most Vietnamese shops competing for this work do not have that document. Having it ready, and sending it the same day, changes how a buyer reads everything you say afterwards. Pair it with a quote that follows these rules.
Register your shop and you will see the part, the weight and the destination before deciding whether to take the enquiry.
Common questions
Will a buyer always visit before ordering?
Increasingly not on a first order. Video walkthroughs, third-party audits and a small trial order have largely replaced the exploratory visit, because they are faster and cheaper. Buyers who place substantial recurring work usually do visit eventually, but the first decision is frequently made without anyone flying anywhere.
What is the single thing most likely to lose us the order at audit stage?
A gap between what was claimed and what is there. A shop that said it has in-house stress relief and turns out to subcontract it has not just lost a capability point, it has lost credibility on every other claim. Understating and then over-delivering is far safer than the reverse.
Should we let a buyer speak to our other customers?
If you can, yes, and it is disproportionately persuasive. Many shops cannot because of confidentiality, which buyers understand. In that case offer something else checkable: third-party inspection reports, certificates, or photographs of comparable work with the customer's identity removed.
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