| ISO 9001:2015 | Quality management system | A documented, audited system for controlling processes, customer requirements, nonconformities, corrective action, and continual improvement. | Current certificate; certification-body name; certificate number; exact legal entity; covered sites; scope of machining and inspection activities; expiry date. | General industrial, commercial, electronics, machinery, and precision metal parts. | High | Confirm that the certificate scope covers the actual production site and relevant CNC machining processes, not only an office or trading entity. |
| ISO 13485:2016 | Medical-device quality management | A quality management system designed for organizations involved in the life cycle of medical devices, including risk-based controls and regulatory requirements. | Current certificate; site and process scope; device-related quality procedures; traceability procedure; change-control and complaint-handling process where applicable. | Medical instruments, implants, surgical components, laboratory equipment, and regulated healthcare parts. | Conditional | Certification does not by itself approve a specific medical device. Review whether the supplier's processes match the applicable device class and customer regulatory obligations. |
| AS9100:2016 | Aerospace quality management | Enhanced quality controls for aviation, space, and defense supply chains, including product safety, configuration management, risk management, and counterfeit-part prevention. | Current certificate; International Aerospace Quality Group certification details; site scope; special-process controls; configuration and traceability records. | Aerospace brackets, structural hardware, flight-related assemblies, and high-reliability defense components. | Conditional | Check whether the certificate covers the manufacturing location and the product or process category being quoted. Special processes may require separate approvals. |
| IATF 16949:2016 | Automotive quality management | Automotive-specific quality requirements built around ISO 9001, including defect prevention, variation reduction, product safety, and supply-chain controls. | Current certificate; manufacturing-site scope; customer-specific requirement process; control plans; process capability reports; automotive traceability records. | Automotive production parts and suppliers serving vehicle manufacturers or tier suppliers. | Conditional | Confirm that the supplier is certified for production at the quoted site. A general ISO 9001 certificate is not equivalent to IATF 16949. |
| ISO 14001:2015 | Environmental management | A structured system for identifying and managing environmental impacts, compliance obligations, waste, energy use, and improvement objectives. | Current certificate; site scope; environmental policy; waste-disposal records; chemical-management controls; environmental objectives and audit records. | Projects with environmental procurement requirements or customers requiring documented sustainability management. | Medium | Review whether the certificate applies to the factory, especially where cutting fluids, plating, anodizing, painting, or other outsourced treatments are involved. |
| ISO 45001:2018 | Occupational health and safety | A management system for controlling workplace hazards, legal obligations, incident prevention, worker consultation, and safety improvement. | Current certificate; site scope; hazard-assessment records; safety training records; incident and corrective-action summaries. | Large production facilities, long-term sourcing programs, and supplier audits with social-responsibility requirements. | Medium | Verify the certificate covers the production facility and is issued to the operating legal entity rather than an unrelated parent or sales office. |
| ISO/IEC 17025:2017 | Testing and calibration laboratory competence | Demonstrated competence, impartiality, and consistent operation of a testing or calibration laboratory. | Laboratory accreditation certificate; accredited scope; calibration uncertainty; equipment identification; traceable calibration certificates; test-method details. | Suppliers performing accredited material tests, dimensional calibration, hardness testing, chemical analysis, or validation testing. | Conditional | Check the accredited scope. ISO/IEC 17025 status for one laboratory does not automatically cover every test performed by the manufacturer. |
| ISO 10360 series | Coordinate-measuring-machine performance | Acceptance and reverification tests for coordinate measuring machines, including specified length-measurement and probing performance characteristics. | Recent CMM calibration or verification report; machine identification; test standard; measurement uncertainty; environmental conditions; traceability statement. | Tight-tolerance parts, complex geometries, aerospace components, medical components, and inspection reports requiring CMM data. | High | Confirm the report belongs to the CMM used for the project and that calibration remains within the stated validity period or scheduled interval. |
| ISO 2768-1 / ISO 2768-2 | General dimensional and geometrical tolerances | General tolerance classes for dimensions and geometrical characteristics when individual tolerances are not specified on the drawing. | Drawing review record; agreed tolerance class; inspection report; documented handling of unspecified tolerances. | Machined parts with drawings that reference general tolerances instead of listing every dimension individually. | High | Confirm the drawing's stated tolerance class and revision. General tolerances should not replace critical tolerances explicitly defined by the customer. |
| ISO 21920 series | Surface texture measurement | Current terminology, rules, and measurement practices for specifying and evaluating surface texture parameters. | Surface-roughness report; parameter used, such as Ra or Rz; calibrated roughness instrument record; measurement direction; sampling length. | Sealing surfaces, sliding components, optical or cosmetic parts, and parts with specified roughness requirements. | High | Ensure the reported parameter, cutoff, sampling length, and measurement direction match the technical drawing or purchase specification. |
| EN 10204:2004 Type 3.1 | Metal material certification | A material inspection document issued by the manufacturer that confirms specified inspection and testing results for the supplied material. | Heat or lot number; material grade; chemical composition; mechanical properties; dimensions; supplier identification; authorized inspection sign-off. | Load-bearing, aerospace, pressure-related, corrosion-sensitive, and fully traceable machined components. | High | Match the heat number on the certificate to the material used in production and, where required, to the supplier's internal traveler or traceability record. |
| RoHS Directive 2011/65/EU and amendments | Restricted substances compliance | Controls specified restricted substances in electrical and electronic equipment placed on the applicable market, subject to scope and exemptions. | Supplier declaration; material declarations; coating and plating information; laboratory test reports where risk justifies testing; exemption references if applicable. | Machined housings, brackets, connectors, heat sinks, and components incorporated into electrical or electronic equipment. | Conditional | RoHS is a regulatory compliance requirement rather than a universal manufacturing certification. Confirm product scope, applicable market, and current substance limits. |
| REACH Regulation (EC) No 1907/2006 | Chemical and substance compliance | Addresses the registration, evaluation, authorization, and restriction of chemical substances in products and supply chains in the European Economic Area. | REACH declaration; SVHC screening statement; plating, paint, lubricant, and polymer information; supporting test or supplier declarations. | Parts supplied into the European Economic Area or containing coatings, adhesives, plastics, lubricants, or other chemical substances. | Conditional | Ask for the declaration date and applicable SVHC candidate-list version. Evaluate the finished article and any surface-treatment materials, not only the base metal. |
| First Article Inspection Report | Production validation | Evidence that the first production part or defined production sample was inspected against the released drawing, specifications, and approved process. | Ballooned drawing; dimensional results; material and finish records; inspection equipment identification; deviations; approval signatures; revision control. | New suppliers, new parts, complex assemblies, regulated industries, and parts with significant drawing revisions. | High | Confirm that the report is based on production-intent tooling, machines, programs, materials, and processes rather than a prototype-only setup. |
| Process Capability Study | Statistical process control | Quantitative evidence that a stable process can meet specified requirements, commonly using indices such as Cp, Cpk, Pp, or Ppk. | Control chart; sample size; data-collection method; capability calculation; tolerance limits; process stability evidence; corrective action for failures. | High-volume production and critical dimensions where consistent variation control is more important than one-time inspection. | High | Agree on sampling rules and acceptance thresholds before production. Capability indices are meaningful only when the process is stable and the data are representative. |
| Calibration and Measurement Traceability | Inspection-system reliability | Evidence that gauges, measuring instruments, and inspection software are maintained and linked to recognized measurement standards. | Equipment register; calibration certificates; due dates; out-of-tolerance procedure; gauge repeatability and reproducibility study where applicable. | All CNC machining programs, particularly tight-tolerance work and customer-supplied inspection plans. | High | Sample-check the calibration status of micrometers, bore gauges, height gauges, CMMs, surface testers, and other instruments used for final acceptance. |
