| 1 | Legal Manufacturing Status | Confirm that the supplier is a legally registered manufacturer rather than only a trading company. | Chinese business license, unified social credit code, registered address, and factory audit report. | Business scope should cover sanitary ware, bathroom products, electrical appliances, or related manufacturing activities. | 15% |
| 2 | Product Safety Compliance | Evaluate electrical safety, leakage protection, heating components, wiring, and market-specific compliance. | Valid test reports and certificates issued for the destination market; product-level documentation should match the offered model. | Documentation should cover the exact model, rated voltage, frequency, plug type, and intended market. | 15% |
| 3 | Water and Electrical Protection | Review protection against water ingress, overheating, current leakage, and abnormal operating conditions. | Independent laboratory test reports, technical drawings, protection-system specifications, and sample inspection records. | The supplier should clearly state applicable protection ratings and installation limitations instead of using unsupported claims. | 10% |
| 4 | Core Function Performance | Assess washing, drying, flushing, seat heating, nozzle movement, deodorization, remote control, and user settings. | Pre-shipment inspection checklist, sample test video, technical specification sheet, and buyer-approved golden sample. | Every advertised function should be demonstrated on the same model and included in the purchase specification. | 12% |
| 5 | Ceramic and Component Quality | Check ceramic consistency, glaze quality, waterway design, valves, pumps, sensors, heating modules, and seals. | Incoming-material inspection records, component bills of materials, supplier approvals, and random production inspections. | Critical components should have defined specifications, inspection criteria, and controlled replacement procedures. | 10% |
| 6 | Quality Management System | Determine whether the manufacturer controls design changes, production defects, traceability, corrective actions, and final inspection. | Quality-management certificate where applicable, process-control documents, inspection records, and nonconformity reports. | A documented inspection process should exist from incoming materials through final packing and shipment. | 10% |
| 7 | Customization and Engineering Capability | Evaluate private-label support, software or control-panel localization, plug standards, installation dimensions, and packaging changes. | Approved drawings, engineering change records, prototype samples, artwork approvals, and documented development timelines. | The supplier should identify which changes are standard, which require tooling, and which affect certification. | 8% |
| 8 | Production Capacity and Lead Time | Check actual capacity, production scheduling, peak-season planning, component availability, and delivery reliability. | Recent production records, capacity statements, purchase-order history with confidential data removed, and factory audit results. | Lead times should be quoted separately for sampling, mass production, customization, and replenishment orders. | 8% |
| 9 | Export, Packaging, and Logistics Support | Assess export documentation, carton engineering, palletization, damage prevention, shipping terms, and after-sales coordination. | Packing specification, drop or transport test records where available, export documents, and shipment references. | Packaging must protect ceramic and electrical components while complying with the destination country's labeling requirements. | 6% |
| 10 | Warranty, Spare Parts, and Service | Review warranty coverage, replacement-part availability, troubleshooting support, technician training, and response procedures. | Written warranty terms, spare-parts list, service-level agreement, repair manuals, and documented customer-support channels. | Warranty exclusions, claim procedures, response times, and spare-parts pricing should be agreed in writing before ordering. | 6% |