by Pedro Adame
One of the newest, hence less studied standards for calibration is the ANSI/NCSL International Z540.3 standard. The main difference with the more known ISO/IEC 17025 standard is the need to estimate and include a Probability of False Acceptance (PFA) in the calibration report. According to the Z540.3 standard, this probability has to be below 2% for the measurement to be in compliance with the standard, and even though it is not a requirement in the ISO 17025:2017 standard, the probability of false acceptance can be used as a statement of conformity according to Clause 7. READ THE FULL ARTICLE (PDF)
