A calibrated instrument is one part of a measurement system. The claim of traceability needs to address the result actually being used for a decision.
NIST defines metrological traceability through a documented calibration chain contributing to a measurement result's uncertainty. NIST — Metrological traceability.
Follow the result
For a soft-product measurement, identify the measured property, method and relevant reference chain. An instrument sticker alone does not describe how the reported value was obtained.
Keep fitness for purpose separate
Traceability does not automatically establish that uncertainty is small enough for the intended requirement. Ask whether the complete result is suitable for the actual decision. Preserve the measurement context rather than using traceable as an unrestricted quality label.
Source reviewed 25 October 2026. Interpretation and original diagrams: PLUSHIP / Qunhe. Examples are illustrative.
Related reading
A Calibration Interval Should Reflect the Measurement Application
Displayed Resolution Is Not the Complete Measurement Uncertainty
A Laboratory Result Starts With the Specimen Actually Submitted