| Sample Testing | Rated welding output | Actual output must reach the declared maximum current under the specified input voltage and frequency. | Independent load test report, calibrated meter records, and a video showing the test setup. | 8% | Pass when measured output is within ±5% of the declared value. | 8/8 |
| Sample Testing | Duty-cycle performance | Duty-cycle rating must be stated according to the applicable product standard and verified at the rated ambient temperature. | Thermal test report identifying test current, test duration, ambient temperature, and recovery time. | 8% | Pass when the sample completes the declared duty-cycle test without thermal protection activation. | 8/8 |
| Sample Testing | MIG and TIG process stability | Stable arc, consistent wire feeding, controllable current, and no abnormal spatter during low-, medium-, and high-current tests. | Standardized weld coupons, parameter sheets, weld photographs, and operator test records. | 8% | Pass when all programmed test ranges operate without repeated arc interruption. | 8/8 |
| Sample Testing | Input-voltage tolerance | Equipment should operate within the declared input-voltage range without error codes, unstable output, or component damage. | Input fluctuation test report covering the lower limit, nominal voltage, and upper limit. | 6% | Conditional if testing covers only nominal voltage. | 4/6 |
| Sample Testing | Safety and protection functions | Over-temperature, over-current, under-voltage, and short-circuit protection must operate correctly. | Protection-function checklist, electrical safety report, and sample fault-test results. | 8% | Pass when each protection function activates and resets as specified. | 8/8 |
| Factory Audit | Quality management system | Documented incoming inspection, in-process inspection, final inspection, calibration control, and nonconformance procedures. | Controlled procedures, inspection forms, calibration certificates, and recent corrective-action records. | 8% | Pass when records are controlled, traceable, and consistently used. | 8/8 |
| Factory Audit | Production capacity and lead time | Capacity must support the forecasted order volume with a documented production schedule and bottleneck plan. | Monthly capacity data, production-line layout, staffing plan, and historical delivery performance. | 7% | Pass when capacity exceeds forecast demand by at least 20%. | 7/7 |
| Factory Audit | Component traceability | Critical components must be traceable from incoming inspection through finished-goods shipment. | Batch records, supplier approval list, serial-number system, and warehouse transaction records. | 7% | Conditional when traceability exists only for finished products. | 5/7 |
| Factory Audit | Supplier corrective-action system | Quality issues must have documented root-cause analysis, containment, corrective action, and effectiveness verification. | Completed corrective-action reports from the previous 12 months. | 5% | Pass when corrective actions include responsible owners and closure dates. | 5/5 |
| Compliance Review | Electrical and market compliance | Required conformity documentation must match the exact model, input specification, and target market. | Declaration of conformity, applicable test reports, technical file index, and product labels. | 8% | Pass when documents are current and model numbers match the supplied samples. | 8/8 |
| Compliance Review | Environmental substance control | Materials and components must meet the restricted-substance requirements applicable to the destination market. | Material declarations, supplier statements, and laboratory reports for controlled materials. | 5% | Pass when documentation covers the complete product or clearly identified components. | 5/5 |
| Contract Review | Product specification control | Contract must define model configuration, rated output, duty cycle, accessories, packaging, labeling, and approved changes. | Signed technical specification, approved golden sample, and engineering-change procedure. | 7% | Pass when changes require written buyer approval before production. | 7/7 |
| Contract Review | Inspection and acceptance terms | Pre-shipment inspection criteria, sampling method, defect classification, and rejection rights must be written into the contract. | Inspection standard, approved checklist, sampling plan, and acceptance timeline. | 6% | Pass when nonconforming goods can be repaired, replaced, or credited under defined terms. | 6/6 |
| Contract Review | Warranty and after-sales support | Warranty period, covered parts, response time, spare-parts policy, and technical-support channel must be clearly defined. | Warranty clause, service-level agreement, spare-parts list, and troubleshooting manual. | 7% | Conditional when response times are stated but spare-parts responsibilities are unclear. | 5/7 |
| Contract Review | Payment and commercial risk | Payment milestones should connect substantial payment to sample approval, inspection, and shipment documentation. | Pro forma invoice, payment schedule, inspection-release condition, and refund or remedy clause. | 5% | Pass when payment exposure is limited before objective quality verification. | 5/5 |
| Decision Rule | Overall supplier qualification | Use a weighted score and reject any supplier with a critical failure in electrical safety, compliance, or sample performance. | Completed evaluation matrix, audit report, signed contract draft, and corrective-action closure record. | 100% | Recommended threshold: at least 85/100 with no unresolved critical finding. | 92/100 |
