| Product Quality | Display resolution and size availability | Confirm that the supplier can provide the required diagonal sizes, aspect ratios, resolutions, viewing modes, and interface options such as RGB, LVDS, MIPI DSI, or eDP. | Current datasheets, dimensional drawings, interface specifications, and sample units. | 8% |
| Product Quality | Luminance and readability | For indoor industrial equipment, approximately 300–500 cd/m² is commonly sufficient. For high-ambient-light applications, consider 800 cd/m² or higher, subject to thermal design and lifetime requirements. | Photometric test report, measured luminance data, uniformity results, and sample evaluation under actual lighting conditions. | 9% |
| Product Quality | Contrast, color, and viewing angle | Check contrast ratio, color depth, viewing-angle definition, color consistency, and whether the panel meets the requirements of the operating environment. | Panel specification sheet, color measurement report, viewing-angle test method, and production sample comparison. | 7% |
| Product Quality | Touchscreen performance | Evaluate projected capacitive or resistive touch technology, glove operation, wet-finger performance, input accuracy, controller compatibility, and cover-lens options. | Touch-controller datasheet, firmware information, test videos, operating-condition results, and compatibility testing with the customer system. | 8% |
| Product Quality | Environmental durability | Define operating and storage temperature, humidity, vibration, shock, corrosion, and altitude requirements according to the final application. Do not accept a generic rating without a test method. | Environmental test reports, test conditions, equipment details, failure criteria, and sample traceability. | 10% |
| Product Quality | Reliability and lifetime | Review LED backlight lifetime, burn-in procedures, pixel-defect criteria, accelerated-aging data, repair policy, and field-failure handling. Lifetime figures must state test temperature and brightness conditions. | Reliability plan, burn-in records, quality-control standards, failure-analysis reports, and warranty terms. | 10% |
| Certifications | Quality-management system | An ISO 9001 certificate issued by an accredited certification body is a useful baseline for production quality management. Verify the certificate scope and validity. | Certificate number, scope, issuing body, validity date, factory address, and online certificate-verification record. | 8% |
| Certifications | Environmental and material compliance | For products entering applicable markets, assess RoHS Directive 2011/65/EU and REACH obligations. Requirements depend on product configuration, destination market, and component composition. | Declaration of conformity, material declarations, supplier declarations, and laboratory test reports for the actual model. | 8% |
| Certifications | Electrical safety and EMC capability | Confirm that the complete display assembly can be evaluated against the applicable product-safety and electromagnetic-compatibility requirements, such as IEC 62368-1 where relevant. | Safety test reports, EMC test reports, CB documentation where applicable, and clearly identified tested configurations. | 8% |
| Technical Capability | Customization and engineering support | Assess the ability to modify mechanical drawings, connector position, cable length, firmware, touch parameters, cover glass, brightness, and mounting structures. | Engineering-change procedure, sample-development schedule, drawing-control process, and named technical contact. | 8% |
| Technical Capability | Optical bonding and mechanical integration | For demanding environments, evaluate air bonding or optical bonding, anti-glare treatment, cover-glass strength, sealing, gasket design, and protection against dust or moisture. | Cross-section drawings, bonding process description, adhesive specifications, IP-test evidence where claimed, and finished-sample inspection. | 7% |
| Technical Capability | Production capacity and supply continuity | Review monthly capacity, lead time, minimum order quantity, component availability, production-site location, second-source planning, and product life-cycle management. | Capacity statement, production plan, lead-time history, material-risk list, end-of-life notification policy, and business-continuity plan. | 6% |
| Supplier Verification | Factory audit and traceability | Perform a documented factory audit covering incoming inspection, process control, calibration, final inspection, nonconforming-product control, and lot traceability. | Audit checklist, corrective-action records, calibration certificates, inspection standards, production-flow photographs, and batch records. | 6% |
| Commercial Risk | Total cost and after-sales support | Compare total cost of ownership rather than unit price alone, including tooling, testing, packaging, logistics, warranty coverage, replacement policy, engineering fees, and technical support. | Formal quotation, warranty terms, service-level agreement, replacement procedure, packaging specification, and landed-cost calculation. | 5% |