DETERMINING ALLOWABLE TEST SET ERRORS
J.M. Wieson, Colin Clark · OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) · 1954
A method is illustrated for determining the placing of test specification limits with respect to performance specification limits when errors of messurement exist. The method is applied to the case of normal (Gaussian) product distribution and normal test-set-error distribution and the performance specification limits set at plus or minus 2 sigma of the product distribution from the nominal product value. Graphs are provided under these assumptions for determining the allowable test set error, the Consumer's Risk (probability that an item is nonacceptable and yet judged acceptable), and the Producer's Risk (probability that an item is acceptable and yet judged nonacceptable) involved for various settings of the test specification limits with respect to the performance specification limits. A test set error demonstrator (a pin-ball type apparatus) constructed at Sandia Corporation to demon strate information of the type contained in the graphs mentioned above is described and evaluated. (auth)