A specification change is complete only when the drawing, sample, SKU, packaging, production release and affected stock all tell the same story.
Open a Change Record Before Changing the Product
Informal change requests are easy to misunderstand. Start a record that identifies the current model, requested change, reason, requester and intended order. Attach the current drawing or approval reference so the factory does not apply the instruction to a similar SKU.
Do not release production from the initial message. The first step is impact review. Even a small seat or carton change can affect artwork, spare parts, pallet counts or an existing customer reference.
Assess Every Interface the Change Touches
Review ceramic, seat, hinges, fixings, inlet and outlet parts, cistern matching, packaging, labels and project documents. A change may be local in design but broad in operations. Ask the manufacturer which tooling, purchased parts and work instructions are affected.
For site projects, include installation and finished-wall interfaces. A revised projection or connection detail may require contractor review even if the visible design changes little.
Issue and Approve a New Drawing Revision
The revised drawing should identify what changed and replace the correct previous version. The buyer and factory should use the same revision in the sample request, purchase order and inspection reference. Remove obsolete copies from active work areas while preserving the history.
If the change cannot be fully shown on a drawing, add a controlled note or component reference. Do not use filenames such as final-new without a clear revision sequence.
Choose the Right Re-Approval Evidence
A document review may be enough for a label correction, while a new seat, ceramic interface or packaging insert may require a physical sample. Decide based on the risk, not convenience. Record why the chosen evidence is sufficient.
When a new sample is needed, compare it with the last approved reference and focus on affected points plus any connected interfaces. Avoid reopening unrelated cosmetic decisions unless the change actually affects them.
Update SKU and Spare-Part References
Decide whether the changed product keeps the same SKU, gains a revision suffix or becomes a new model. Consider warehouse identification, replacement seats, customer catalogs and stock already in the market. A silent change under one code can make after-sales support unreliable.
Map old and new component references. If both versions may remain in stock, define how cartons and internal records distinguish them.
Control Packaging and Existing Materials
A product change can make existing inserts, printed cartons or labels obsolete. Count affected materials before approval and decide whether they can be used, modified or must be isolated. The commercial responsibility should be recorded rather than discussed after production.
Recheck product protection when geometry or component placement changes. A seat update can alter the load path or contact risk inside the carton even when the outer carton stays the same.
Manage the Transition Across Open Orders
A specification change rarely occurs in isolation. List open quotations, samples, purchase orders, work in progress, finished stock, printed packaging and spare parts that reference the current version. Assign each item a disposition: remain old version, convert to new version, consume under written approval or stop. This prevents the factory from applying the new instruction to every order simply because it is the latest message.
Choose an effective point that operations can recognize, such as a named purchase order, production batch or approved date combined with model reference. Calendar dates alone can be unclear when material was produced earlier but packed later. Tell the warehouse and after-sales team how old and new versions will be identified during the overlap period.
Inform affected project or sales teams with a short impact note. State what changed, what did not change, compatibility implications and which documents now control. Where old and new products cannot be mixed, include receiving and stock-separation instructions. Keep the transition open until quantities under both versions are reconciled. This makes the change manageable across commercial and physical records, not only correct in the engineering folder.
Plan the first replenishment and claim response before closing the transition. Confirm which replacement seat, hinge, fixing kit or connector belongs to each version and how service staff can identify it from the installed product or carton record. If identification is impossible without dismantling the product, improve labels or delivery records while both versions are still accessible. Update customer-facing parts lists only after the mapping has been checked against actual packed sets.
Use the first changed shipment as a controlled verification point. Ask inspection and receiving teams to record both the new identifiers and the affected physical feature, then compare their evidence with the release package. Check a small number of replacement components against the changed product where practical. Any unexplained mixture should reopen the transition record, stop further release of the affected stock and trigger a model-by-model reconciliation rather than a broad verbal assurance.
Close the commercial side as well. Confirm whether tooling, obsolete material, new samples or relabeling created agreed charges, and show them against the relevant change record. A technically correct revision can still produce a dispute when cost responsibility was left in chat messages. Written close-out should cover product, stock, schedule and cost before the next repeat order uses the new version.
Release Production Only After Close-Out
The release package should contain the approved drawing, sample status, component list, packaging reference, SKU decision and effective order or date. Identify work-in-progress and finished stock under the old version.
After the first changed batch, review inspection and packing evidence. Close the change only when the delivered records match the approved revision.
| Request | Current model, requested change and affected order are identified. |
|---|---|
| Impact | Product, system, packaging, SKU, spares and site interfaces are reviewed. |
| Approval | Drawing and physical evidence match the risk of the change. |
| Transition | Old stock and materials are counted, identified and dispositioned. |
| Release | Production uses one complete approved revision package. |
Buyer Checklist
- Open a formal change record.
- Reference the current approved model and drawing.
- Review every affected interface.
- Issue a controlled drawing revision.
- Choose document or sample re-approval by risk.
- Update SKU and spare-part mapping.
- Control obsolete packaging and stock.
- Verify the first changed production batch.
Related Product and Project References
| Product categories | Wall Hung Toilets |
|---|---|
| Product models | TT2418D TT2462D |
| Project references | modular bathroom projects residential development bathrooms |
| Support | OEM & ODM Quality Contact |
FAQ
Does every specification change need a new physical sample?
No. Select evidence according to risk, but use a sample when appearance, fit, installation or packaging performance cannot be confirmed from documents.
Can a revised seat keep the same SKU?
Possibly, but only after reviewing replacement compatibility, stock identification, customer records and the risk of mixing versions.
What should happen to old packaging?
Count and isolate it, then record whether it can be used, modified or must be removed from the active order.
When is a change fully closed?
When approved documents, production references, packaging, inspection and delivered records all reflect the released revision.