Clause 6.5

ISO 17025 Metrological Traceability

Establish and validate metrological traceability per ISO/IEC 17025:2017 Clause 6.5. Documents traceability chains from working standards through reference standards to NMI/SI for each measurand. Manages reference standards and certified reference materials (CRMs) with certificates, expiry tracking, and storage conditions. Extension tools validate chain completeness and reference standard register entries.