Accession Number : ADA321309

Title :   Assessment of NDE Reliability Data.

Descriptive Note : Final rept. Jul 74-Sep 75,

Corporate Author : GENERAL DYNAMICS FORT WORTH TX FORT WORTH DIV

Personal Author(s) : Yee, B. G. ; Chang, F. H. ; Couchman, J. C. ; Lemon, G. H. ; Packman, P. F.

PDF Url : ADA321309

Report Date : OCT 1976

Pagination or Media Count : 457

Abstract : Twenty sets of relevant NDE reliability data have been identified, collected, compiled and categorized. Three relevant on-going programs are being monitored for future usage. A criterion for the selection of data for statistical analysis considerations has been formulated. A model to grade the quality and validity of the data sets has been developed. Data input formats, which record the pertinent parameters of the defect/specimen and inspection procedures, have been formulated for each NDE method. A comprehensive computer program has been written to calculate the probability of flaw detection at several confidence levels by the binomial distribution. This program also selects the desired data sets for pooling and tests the statistical pooling criteria before calculating the composite detection reliability. Probability of detection curves at 95 and 50 percent confidence levels have been plotted for individual Sets of relevant data as well as for several sets of merged data with common sets of NDE parameters.

Descriptors :   *COMPUTER PROGRAMS, *DETECTION, *NONDESTRUCTIVE TESTING, *DEFECTS(MATERIALS), *STATISTICAL ANALYSIS, *DEFECT ANALYSIS, DATA BASES, DATA PROCESSING, INPUT, MODELS, STATE OF THE ART, PROBABILITY, STATISTICAL DATA, RELIABILITY, INSPECTION, DATA ACQUISITION, DATA DISPLAYS, STATISTICAL DISTRIBUTIONS, SELECTION, CONFIDENCE LEVEL, BINOMIALS.

Subject Categories : Metallurgy and Metallography
      Miscellaneous Materials
      Statistics and Probability
      Computer Programming and Software

Distribution Statement : APPROVED FOR PUBLIC RELEASE