What does a performance characteristic sheet provide?

What does a performance characteristic sheet provide?

• A. A calibration log
• B. An explanation of the statistical methodology used and empirical results for thresholds
• C. A user guide
• D. A maintenance schedule

Answer: (B)

A performance characteristic sheet shows the statistical basis and the data behind the method’s decision thresholds. It provides the statistical methodology used to establish those thresholds and the empirical results that demonstrate how the thresholds perform in practice. It lays out how limits like detection or decision thresholds are derived, the expected precision and accuracy, and the confidence intervals around those thresholds, along with data from tests or trials that illustrate true/false positive behavior at various levels. This helps a lead inspector understand why a result is interpreted a certain way and how trustworthy the threshold values are. It isn’t a calibration log, which records calibration events; it isn’t a user guide for operating the equipment; and it isn’t a maintenance schedule.

A performance characteristic sheet shows the statistical basis and the data behind the method’s decision thresholds. It provides the statistical methodology used to establish those thresholds and the empirical results that demonstrate how the thresholds perform in practice. It lays out how limits like detection or decision thresholds are derived, the expected precision and accuracy, and the confidence intervals around those thresholds, along with data from tests or trials that illustrate true/false positive behavior at various levels. This helps a lead inspector understand why a result is interpreted a certain way and how trustworthy the threshold values are. It isn’t a calibration log, which records calibration events; it isn’t a user guide for operating the equipment; and it isn’t a maintenance schedule.