How is a device described when its performance conforms to the standard within the applicable tolerances and other performance requirements?

A device is described as accurate when its performance aligns with the specified standards and remains within the acceptable tolerances and other performance requirements. Accuracy refers to how closely the measured value conforms to the true or accepted reference value. This means that if a device is accurate, it consistently provides results that are true reflections of what is being measured, adhering to the limits set by the standards in place.

While the other terms have distinct meanings: precision relates to the consistency of repeated measurements, reliability refers to the device's ability to perform consistently over time and under different conditions, and efficiency pertains to how effectively a device uses resources to achieve a result, none of these directly imply successful adherence to the specified performance measures as accuracy does.