Truncation of the Distribution of Parts Failures by Screening.
Abstract
The value of acceptance test screening as a quality assurance tool is explored from the viewpoint of radiation hardness assurance. Since parts failures that occur due to the application of extreme environments such as radiation can most frequently be described using the normal distribution, the bivariate normal distribution is assumed. Numerical and graphical tabulations of the distribution failures are presented for various screening levels below which all parts are rejected. In this report the calculations required to evaluate acceptance test screening as a radiation hardness assurance tool are explained and the methods of estimating the error resulting from assuming normal distribution detailed. Examples are given to show that poorly correlated screens are nevertheless useful for radiation hardness assurance when extreme readiation levels are not anticipated and that hardening by screening is unproductive when high radiation levels are anticipated.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1977
- Accession Number
- ADA039835
Entities
People
- R. D. Chronister
- R. J. Maier
Organizations
- Air Force Research Laboratory