The guidelines provided in the ASTM validation practices (D6122) can be part of a complete process analysis implementation strategy. Near-infrared spectroscopy is a routine measurement and analysis tool for both liquid and solid samples in a wide variety of industries and locations, both process and laboratory. For process measurement analyzers, validation is a key component of a complete measurement system. Guided Wave offers the Stability Monitoring System, which is a D6122 compliant solid-state process analyzer accessory.