6. Measurement & Validation
You cannot control what you cannot accurately measure. If a production test fixture or a primary calibration standard is even slightly compromised, all resulting pass/fail data becomes unreliable. This can lead directly to the shipment of defective products to customers.
This chapter details the structured engineering protocols we use for equipment calibration, Gauge Repeatability and Reproducibility (GR&R) studies, and overall metrology validation. By statistically proving that our specific measurement systems are both accurate and precise, we ensure the integrity and reliability of our final inspection results across all facilities.
- 6.1 Measurement system analysis: gauge R&R
Before any production data can be trusted, the physical tool that generated it must be trusted. If the metaphorical ruler is made of elastic, every single measurement it produces is a lie. Measurement System Analysis (MSA) is the engineering discipli...
- 6.2 Calibration management
Measurement without rigorous calibration is just an unsubstantiated engineering opinion. In a high-precision manufacturing environment, an uncalibrated gauge provides false confidence to the build team. Calibration Management is not merely an adminis...
- 6.3 Equipment validation: IQ/OQ/PQ
Verification (inspecting the final product) only indicates if a mistake was made; Validation (rigorously qualifying the machine process) ensures a mistake cannot be made in the first place. In high-reliability EMS manufacturing, quality cannot just b...
- 6.4 Inspection method validation: AOI, X-ray, ICT, FCT correlation
Inspection should not be viewed as a passive safety net. It is an active, quantifiable data acquisition system that defines the true quality state of the PCBA. Relying on unvalidated inspection equipment can be more detrimental than having no inspect...