How to check a factory really has the equipment it says it has
Ask what the equipment cannot do. A factory that owns a process knows its limits, its cycle time and what it rejects; one that subcontracts it repeats your own words back with a yes. Then ask for a sample made on that machine, the make and model, photographs with the factory's own signage visible, and the name of whoever confirmed it. Subcontracting is not disqualifying, but not being told is.
A sales office will say yes to almost anything. Four checks turn a claim into a fact, and the useful one is asking what the machine cannot do.
The problem is that yes is free
A sales office is measured on enquiries converted, not on capabilities correctly described, and the person answering your message is very often not the person who would have to make the thing. So the answer to "can you do this" is yes, and the answer to "do you have this machine" is also yes, and neither costs anything to say.
This is not usually dishonesty in the way a buyer first assumes. A factory that subcontracts a coating process two towns away can reasonably describe itself as offering that coating; a trading company that works with such a factory can reasonably say the same. The gap only becomes a problem when it is invisible to you, because it changes lead time, it changes who controls quality, and it changes who you can hold responsible when a batch comes back wrong.
So the object is not to catch anybody out. It is to convert a claim into a described fact, early, while changing supplier is still cheap.
Ask what it cannot do
This is the single most useful question, and it works because it inverts the incentive. Every real process has limits: a maximum part size, a minimum batch, a cycle time, a colour it struggles with, a tolerance it will not hold, a material it cannot take. Someone who runs the machine can list them without pausing, and often volunteers one before you finish asking.
Someone who does not have it cannot, because limits are not on a product page. What comes back instead is reassurance: it can do everything, no problem, any size. Confident breadth is the tell. The same question asked as "what is the largest part you can run" or "what is your reject rate on this process and what causes it" produces the same split.
Follow it with a question about the last time it went wrong. A production floor has a story; a listing does not.
Four checks, in the order that costs least
Start with the ones that cost nothing, because most claims fail at the first and you will have spent an email. The order matters more than the list.
First, the make and model of the equipment, and how many of them. It is a fact, it is cheap to ask, and it is hard to invent convincingly. Second, photographs or a short video taken on the floor with the factory's own signage or a dated sheet visible, rather than catalogue images, which are the most commonly recycled thing in the trade. Third, a sample produced on that equipment for your part, not a catalogue sample from a shelf, because a shelf sample proves someone made something once. Fourth, a video call walked through the relevant line, which costs half an hour and settles most remaining doubt.
Then ask the process question that matters for your product: is it in-house or subcontracted, and if subcontracted, to whom and how far away. Distance is a proxy for control: a partner in the same industrial park behaves differently from one four hours away, and both behave differently from a partner the factory has never visited.
Where the capability is the whole reason you chose them, and the order is large enough to justify it, an independent audit settles it properly. The checks above are what you do before you are willing to pay for that.
| Ask for | A real answer | An evasive one |
|---|---|---|
| What the process cannot do | Specific limits, offered quickly | It can do everything, no problem |
| Make, model and how many | Named, with a count | A brand category, or a change of subject |
| Photographs from the floor | Signage or a dated sheet in frame | Catalogue images, or images you can find elsewhere |
| A sample made on that machine | Your part, with the settings used | A shelf sample of something else |
| In-house or subcontracted | Stated plainly, with the partner named | Both, depending on the question |
Write the capability into the order, not just the enquiry
Everything above establishes a fact on a given day. What holds it is the order: name the process, name the equipment where it matters, and say that subcontracting it requires your written agreement. That turns a later change from a surprise into a breach, which is the only mechanism you have at this distance.
Keep the approved sample and say in the order that deliveries are checked against it. Our guide on minimum orders and sampling covers why the golden sample is the standard rather than the words, and writing a product spec covers the measurements that go with it.
None of this is adversarial. A good factory would rather you specified it precisely, because a buyer who checks is a buyer who will not blame them for something that was never agreed. The suppliers who dislike a written capability clause are the ones for whom it would be a problem.
Frequently asked questions
What is the best single question to ask about a factory's equipment?
Ask what the process cannot do. Real limits — maximum part size, minimum batch, cycle time, a tolerance it will not hold — are known instantly by whoever runs the machine and are not on any product page. Confident breadth, meaning it can do everything with no problem, is the tell that the capability is not in the building.
Is it a problem if a factory subcontracts the process?
Not in itself. It changes lead time, who controls quality and who you can hold responsible, so it changes your risk rather than making the supplier unusable. What is a problem is not being told. Ask whether it is in-house or subcontracted and, if subcontracted, to whom and how far away.
How do I know the photographs are really their factory?
Ask for images or a short video taken on the floor with the factory's own signage or a dated sheet visible, rather than catalogue images, which are the most recycled material in the trade. A video call walked through the line costs half an hour and settles most of what photographs cannot.
How do I stop the capability quietly changing later?
Write it into the order rather than leaving it in the enquiry: name the process, name the equipment where it matters, and require your written agreement before it is subcontracted. That turns a later change from a surprise into a breach, which is the only mechanism available at this distance.