| 1Verify the quality management system |
Formal quality processes, document control, corrective action, internal audits, and management review |
ISO 9001:2015 |
Valid certificate, certification scope, issuing certification body, audit status, quality manual index, and sample corrective-action records with confidential information removed |
Certification scope must cover the supplied precision technology, manufacturing, or inspection activities; no overdue major corrective actions |
Check certificate validity with the issuing certification body and review the latest audit findings |
20% |
| 2Match certifications to the application |
Industry-specific controls for regulated, safety-critical, medical, aerospace, or automotive applications |
AS9100 for aerospace; ISO 13485 for medical devices; IATF 16949 for automotive quality systems |
Industry-specific certificate, exact scope, applicable site address, special-process approvals, and customer-specific requirement matrix |
Required certification must apply to the actual production site and product scope, not only to a corporate or administrative location |
Compare the certificate scope with the purchase specification, manufacturing site, and intended end-use requirements |
15% |
| 3Evaluate measurement capability |
Accuracy, traceability, calibration management, measurement uncertainty, and suitability of inspection equipment |
ISO 10012 for measurement management; ISO/IEC 17025 for competent calibration laboratories |
Calibration register, calibration certificates, traceability statements, measurement uncertainty data, equipment maintenance records, and out-of-tolerance procedure |
Critical measuring equipment must be within calibration at the time of use and traceable to national or international measurement standards |
Sample calibration records and confirm that equipment capability is appropriate for the required product tolerance |
15% |
| 4Inspect the inspection system |
Incoming inspection, in-process controls, final inspection, sampling plans, and objective release criteria |
ISO 2859-1 for attribute sampling; customer specifications and documented control plans |
Process flow chart, control plan, inspection instructions, first-article report template, final inspection report, sampling rationale, and nonconforming-product procedure |
Every critical characteristic must have a defined method, frequency, acceptance limit, responsible role, and retained inspection record |
Conduct a process audit and trace one sample order from incoming material through final release |
15% |
| 5Confirm process capability |
Statistical process control, stability of critical dimensions, repeatability, reproducibility, and variation reduction |
ISO 22514 for process capability and performance; AIAG MSA methods where contractually applicable |
Capability studies, control charts, gauge repeatability and reproducibility studies, process risk analysis, and trend reports for critical characteristics |
For stable, normally distributed critical processes, a common target is Cpk ≥ 1.33; acceptance limits must be agreed before production |
Review recent production data, confirm calculation methods, and verify that data represent normal operating conditions |
15% |
| 6Assess traceability and material control |
Raw-material identification, lot control, revision control, production history, and recall or containment capability |
ISO 9001:2015 clauses on identification, traceability, and documented information; applicable material specifications |
Material certificates, heat or lot records, traveler documents, barcode or serial-number logic, engineering revision records, and retention policy |
The supplier should be able to link a finished part to its material lot, process records, inspection results, operator or machine records, and drawing revision |
Perform a backward and forward traceability exercise using a randomly selected production lot |
10% |
| 7Review performance and improvement discipline |
On-time delivery, defect rate, customer complaints, response speed, root-cause analysis, and continuous improvement |
ISO 9001:2015 requirements for performance evaluation and improvement; agreed supplier quality metrics |
Anonymous performance dashboard, delivery records, defect and return trends, 8D or equivalent corrective-action reports, response-time data, and improvement project summaries |
Use agreed targets such as on-time delivery ≥ 95%, complete corrective-action response within 10 business days, and downward defect trends |
Review at least six months of trend data and verify that corrective actions include containment, root cause, action ownership, and effectiveness checks |
10% |