The multiplication that looks right and is not
When an order doubles, the first thing that happens in most buyers’ spreadsheets is that the quantity cell is doubled and the total is recalculated. The unit price is left alone because it was quoted per piece, and the schedule is left alone because it was quoted in days. Both of those assumptions are usually wrong, and they are wrong in ways that do not show up until the goods are late or the freight invoice arrives.
An order is not a quantity. It is a set of commitments — material, moulds, kiln time, labour, packaging, freight, documents — and only some of them scale linearly. Doubling the quantity changes the mix of those commitments, and the changes are not symmetric: some things move immediately, some move later, and some get slower in a way that no unit price can express.
What moves first
The first constraints to react are the physical ones, and they react within the plant rather than in the paperwork:
- Material. Body and glaze materials are bought against a production plan, and a larger plan is a larger purchase with its own delivery time from the supplier.
- Moulds in rotation. A larger run needs more working moulds cycling at once, or the same moulds used for longer, which pushes wear and replacement forward.
- Kiln slots. Firing time is the least elastic input in the plant, and a bigger order competes with every other order already booked into the kiln.
- Packing material and cartons. Printed cartons are ordered against a quantity, and a revised quantity may mean a revised print run rather than a top-up.
- Container count. More pieces means more loads, and more loads means booking, which is a separate schedule with its own constraints.
All five move at once, and the one that decides the date is whichever is slowest on the day. That is not necessarily the kiln. On an order that includes a colour finish, it is often the moulds and the changeover; on an order that fills more than one container, it is often the booking.
What gets slower without getting more expensive
Some things do not cost more per piece but take longer per piece, and these are the ones that a multiplied quotation hides completely. A larger run of one model in white is efficient: the line settles into a rhythm and the kiln loads consistently. A larger run that includes a colour finish interrupts that rhythm, because the finish needs its own changeover and its own handling, and because colour and matt finishes carry a per-model minimum of 30 pieces, which shapes how the order has to be split.
Inspection slows in a similar way. A larger quantity is more pieces to check, more records to complete and more chances for a batch to be held. None of that appears in a unit price, and all of it appears in the date the container is ready. Loading slows too, and so does the document work that follows it, because a load that needs more than one container needs more than one set of documents.
The lines that must be re-quoted rather than multiplied
This is the practical core of the matter. A short list of cost lines behave differently from the goods they sit next to, and each of them needs a fresh quotation at the new quantity rather than a multiplication of the old one:
- Freight, which is priced by container and by route rather than per piece, and which changes character when the load no longer fits one container.
- Insurance, which follows the insured value and the mode, and which may be quoted on different terms at a different volume.
- Terminal handling and destination charges, which are levied per container or per document rather than per piece.
- Any one-off cost in the original quotation, such as tooling or artwork, which does not double because the order doubled and should be re-stated rather than scaled.
- Packing, where carton print runs and pallet configurations have their own thresholds.
- Bank charges and documentary costs, which are per transaction and per document set rather than per unit of value.
A buyer who multiplies those lines will produce a budget that is wrong in both directions: too high on the per-piece items that enjoy no scale, and too low on the per-shipment items that duplicate. The error usually nets out to something that looks plausible, which is why it survives until the invoices arrive.
Container geometry is not arithmetic
Sanitaryware does not cube neatly. Pans are bulky, cisterns nest differently from pans, and the way a load is built depends on the mix of models rather than on the total count. A container filled with one model loads differently from a container filled with a range, because the range has to be braced and separated and because a mixed load cannot use the same stacking pattern throughout.
So doubling the quantity does not reliably double the container count. It may produce a load that is one container and a remainder, and the remainder is the expensive part: it carries a full set of fixed costs against a fraction of the goods. This is the point at which a buyer should be asking a different question — not how to fit the double order into containers, but whether the double order should be split into two shipments that each load cleanly. That decision belongs before the order is confirmed, not after the packing list exists.
Asking for the schedule before the price
When an order grows, the instinct is to ask for a revised price. The more useful first question is what the revised schedule looks like, because the schedule tells you which of the constraints above has become binding. If the answer is that the date moves by a little, the plant had slack. If the answer is that the date moves by a lot, or that the order has to be split, the constraint is real and the price conversation should follow from it rather than lead it.
Two specific questions make the answer concrete. First: does the larger quantity still run as one production block, or does it become two? Second: at what point in the quantity does the plant need to change something — an extra mould set, an extra shift, a second container booking? Neither question asks for a number the factory should not give, and both produce an answer a buyer can plan from.
What to renegotiate, and what simply scales
Not everything is a negotiation. Material cost scales with quantity and there is nothing to discuss about that, though the mix of models affects how efficiently the material is used. What is worth renegotiating is the structure: whether the order runs as one block or two, whether the second container can follow the first on a defined schedule, whether the payment milestones should be attached to each shipment or to the order as a whole, and whether the inspection should happen once or per container.
The last one matters more than it sounds. A single inspection covering a load that leaves in two shipments leaves the second shipment uninspected, and the buyer discovers any drift after the goods are on the water. Inspection per shipment costs the buyer’s time and is the correct arrangement for a divided order.
How we handle a quantity change
When a buyer comes back with a larger quantity, we answer in a fixed order: schedule first, then the split across containers, then the lines that need re-quoting, then the price. That order exists because a price quoted against a schedule nobody has confirmed is a number that will be revised twice.
The fixed terms do not change with the quantity: samples free, MOQ 0 on white vitreous china, a per-model minimum of 30 pieces on colour and matt finishes, production of 30–40 days from approval, TT or LC, and a lifetime warranty on the ceramic body. What changes is how those terms land on a larger order — how many production blocks, how many containers, how many inspections.
The plant that has to absorb the change is at Chaozhou in Guangdong: 51,000 m², 285 people, built in 2021, with its own tunnel kiln and casting, glazing, firing and QC in the same factory. 89 vitreous china models run through it, across two-piece, one-piece, wall-hung, back-to-wall, smart, bidet and accessible types, which is also why a quantity change is usually a mix question rather than a single-model question.
Frequently asked questions
Does doubling an order double the lead time?
Not usually, and not simply. Part of the work scales and part of it does not: material and moulds scale with quantity, while firing time and container booking are closer to fixed blocks. The result is usually a step rather than a multiple.
Which costs should not be multiplied?
Freight, insurance, terminal handling, bank and documentary charges, and any one-off tooling or artwork in the original quotation. Those are priced per shipment, per container or per transaction, so they duplicate rather than scale, and multiplying them understates the larger order.
Why might a larger order need to be split?
Because sanitaryware does not cube neatly and a load that exceeds one container leaves a remainder that carries a full set of fixed costs. Splitting into two clean loads is often cheaper and always easier to inspect, even though it means two bookings and two document sets.
What should I ask for first when the quantity changes?
The revised schedule. Ask whether the order still runs as one production block, and at what quantity the plant has to add a mould set, a shift or a container booking. The price follows from those answers rather than the other way round.
Does a larger order get a better unit price?
It can, where the larger quantity uses the plant more efficiently, and it may not, where it forces a changeover, a second booking or an extra inspection. The honest answer depends on the mix, which is why a quantity change should be quoted against a schedule.
Should inspection be repeated for each container?
Yes, where the order leaves in more than one shipment. A single inspection covers only the goods present when it happened, and the later container would otherwise travel uninspected. Repeating it per shipment costs time and protects the buyer’s position.
Related on this site
Documents and certificates
- Ask for a revised schedule before a revised price
- Catalogues, drawings and the published test reports
Related reading
- What a sanitaryware lead time is made of
- Loading toilets into a container
- Deposits and Cash Flow on Container Orders