Buyers tend to ask the wrong first question about capacity. "Can you make 50,000 chairs?" Almost any factory will say yes. The question that actually predicts whether your order ships on time is narrower: how many of your specific chair can the line finish per day once it is fully tooled, and what happens to that number when a second large order lands in the same week. We run 117,000 m² of plant and 1,400-plus people in Anji, and even at that size the honest answer is never "unlimited."
Capacity is a daily rate, not a building
A chair line is a sequence of stations — frame welding, foam and upholstery, base and caster assembly, mechanism fitting, final QC, packing. The line can only finish a chair as fast as its slowest station. That slowest station is the bottleneck, and it sets the whole line's output regardless of how big the factory is. In lean terms, you size the line to a takt time — available working seconds divided by the number of chairs you need per day. If demand says one chair every 40 seconds and your upholstery station needs 70, that station decides your day, full stop.
So when we quote a lead time on a large office-chair order, what we are really telling you is the bottleneck rate times the working days, plus the tooling and material lead time in front of it. A bigger plant helps because we can run more lines in parallel and move people to the bottleneck. It does not repeal the math.
The three ways a factory finds more output
When an order exceeds the comfortable daily rate, there are exactly three levers, and each has a cost you should know about. Overtime is the fastest — same line, longer hours — but past roughly a week or two it raises defect rates because tired hands miss things at final assembly. A second shift adds real capacity but needs trained people; pulling green workers onto a complex executive chair to hit a date is how you get loose armrests in the field. Adding or re-balancing a line is the cleanest for sustained volume, but it takes setup time you have to plan weeks ahead.
Here is the trade-off we put to buyers plainly. If you compress the schedule hard, we will quote it, but we will quote overtime or a rushed second shift, and that is precisely the condition under which quality drifts. We would rather you give the line its natural rate and a realistic date than push us into the window where the warranty claims start. On a 40HQ of chairs, a two-week-too-aggressive date is not worth the rework freight.
What to ask before you place the order
Three questions separate a factory that has actually run your volume from one that is guessing. Ask for the daily finished-chair rate on your model, not the floor area. Ask what the bottleneck station is and whether your spec moves it — a heavy upholstered executive chair bottlenecks at sewing and foam, a mesh task chair at frame and mesh tensioning. And ask how a second large order in the same window would be sequenced, because that is the real-world case that wrecks dates.
What "117,000 m²" does and does not buy you
Floor area gets quoted because it is easy to say and impressive to read. What it actually buys is parallelism and buffer: room to run several lines at once, to stage raw material so the line never starves, and to hold a finished-goods buffer while containers are booked. Those are real advantages on a big order — a small workshop that runs one line has nowhere to absorb a hiccup. But area does not change the bottleneck rate of any single line, and it does not manufacture skilled upholsterers overnight. We have 1,400-plus people precisely because seating is still hand-intensive at the upholstery and final-assembly stations; the machines help, but a person still trims, sews and checks. When a buyer tours the plant, the number that should reassure them is not the square metres, it is how many trained hands are on the stations that gate output.
There is a quieter benefit too. Being in Anji — the county that grew into China's chair-making cluster — means mesh, foam, gas lifts, bases and frames are mostly made within a short drive. For a large order, that shortens the material lead time in front of the line, which is usually a bigger schedule risk than the assembly itself.
Where quality slips when volume climbs
The failure mode at volume is not dramatic; it is drift. The first chairs off a new run are usually clean because everyone is paying attention. The risk is units 10,000 through 30,000, when the line is tired and the early scrutiny has relaxed. That is why we hold in-line checks at the stations that produce the costliest field failures — a quick load and swivel check, an armrest torque check — rather than relying only on a final random inspection at the end. Catching a loose mechanism at the fitting station costs seconds; catching it after packing costs an unpacked carton, and catching it in the field costs a warranty claim and a reseller's patience. On a large order we agree the inspection plan up front so the drift gets caught at unit 12,000, not at the port.
We build to BIFMA and EN test methods and third-party testing can be arranged per order; scaling volume does not change which standard we build to, only how many units pass through it. If you are sizing a program, send us the model, the annual quantity and the delivery windows and we will map the line rate honestly. Start through our contact page, see what we run on the products page, or read how we handle private-label runs in OEM / ODM. The mechanics of holding a date are covered in our note on lead-time reliability.