RELIABILITY PREDICTION AND DEMONSTRATION FOR AIRBORNE ELECTRONICS.
Abstract
The study was concentrated in two complementary areas: (1) development of Confidence Determination Methods to quantify the degree of uncertainty related to current reliability prediction techniques, and (2) the combining of Bayesian and classical approaches in a proposed Reliability Demonstration Procedure. In the Confidence Determination Methods development, both system and parts level approaches were developed. In both of these approaches a traditional reliability prediction has been teamed with an associated degree of uncertainty quantified in terms of the so-called 'coefficient of variation,' which is the ratio of the standard deviation value to the mean. The package of prediction and 'coefficient of variation' in turn provides required inputs for the proposed reliability demonstration procedure. The prediction package and prior test data are used as the basis for selecting the most cost effective reliability demonstration plan. The selection is systematized through the use of a confidence limit criterion. This allows switching from a so-called 'normal' to a 'reduced' MIL-STD-781A reliability test with resultant reductions in test times if the prior prediction and data are significantly better than contractually required. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1968
- Accession Number
- AD0841095
Entities
People
- C. M. Dewitt Iii
- E. G. N. Yem
- K. L. Wong
- R. H. Myers
Organizations
- Hughes Aircraft Company