#### Location

Williamsburg, VA

#### Start Date

1-1-1988 12:00 AM

#### Description

The validity of a nondestructive inspection method can be measured by two quantities, the probability that a given flaw size will be detected, and the probability that background noise will give rise to a false indication of the presence of a flaw. Unfortunately, experimental determination of the probability of detection (POD) and the probability of false alarm (PFA) requires a rather extensive set of measurements to obtain statistically sound estimates. Furthermore, if one or more of the parameters that define the method, such as the scan track spacing or probe configuration, are changed, then the full set of measurements must be repeated to obtain new estimates of the POD and PFA, thus adding to the time and expense of test validation. In some situations, where one is designing an inspection for a part or flaw size that is not yet available for testing, there is no way that the validity of a proposed inspection can be evaluated beforehand.

#### Book Title

Review of Progress in Quantitative Nondestructive Evaluation

#### Volume

7B

#### Chapter

Chapter 8: NDE Systems and Reliability

#### Section

Reliability

#### Pages

1753-1760

#### DOI

10.1007/978-1-4613-0979-6_107

#### Copyright Owner

Springer-Verlag US

#### Copyright Date

January 1988

#### Language

en

#### File Format

application/pdf

Prediction of the Probability of Eddy Current Flaw Detection

Williamsburg, VA

The validity of a nondestructive inspection method can be measured by two quantities, the probability that a given flaw size will be detected, and the probability that background noise will give rise to a false indication of the presence of a flaw. Unfortunately, experimental determination of the probability of detection (POD) and the probability of false alarm (PFA) requires a rather extensive set of measurements to obtain statistically sound estimates. Furthermore, if one or more of the parameters that define the method, such as the scan track spacing or probe configuration, are changed, then the full set of measurements must be repeated to obtain new estimates of the POD and PFA, thus adding to the time and expense of test validation. In some situations, where one is designing an inspection for a part or flaw size that is not yet available for testing, there is no way that the validity of a proposed inspection can be evaluated beforehand.