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Title: Invalid Basis for Recommendations
Review: The work offers a code of best practices for the in-service inspection (ISI) of structures which function under mechanical stress. Thus, the question arises of how the authors know what is best. What is best in diagnostic instrumentation is what is most reliable.Conventionally, the reliability of a diagnostic instrument is determined by measuring its false negative and false positive error probabilities. However, this mechanism is not available in this case, for ISI violates an axiom of probability theory (see "Erratic Measure," in NDE for the Energy Industry 1995. The American Society of Mechanical Engineers, New York, NY.) Then how do the authors know the reliability?This reviewer gathers that, when ISI was developed, its developers assumed probability theory. With this assumption false, the work's recommendations are invalidated.
