Accession Number : AD0774825

Title :   Utilization of Burn-In Data in Determining Constant Failure Rate,

Corporate Author : ARMY MATERIEL COMMAND TEXARKANA TEX INTERN TRAINING CENTER

Personal Author(s) : Craddock,William T. ; Foster,Joseph W.

Report Date : MAY 1973

Pagination or Media Count : 123

Abstract : The research investigates a three-parameter model for a hazard function that adequately describes the infant mortality and useful life regions of the bathtub curve. The corresponding time-to-failure probability density function is derived and the maximum likelihood equations are developed for the three parameters. The resulting system of equations is transcendental. The Newton-Raphson Method, an iterative technique, is employed to solve this system of equations. Also, an algorithm for determining a starting solution set for the Newton-Raphson Method is discussed. Computer programs are provided for both the Newton-Raphson Method and the starting solution algorithm. (Modified author abstract)

Descriptors :   *Reliability, Life tests, Failure, Rates, Distribution functions, Statistical analysis, Estimates, Probability density functions, Computer programs

Subject Categories : Mfg & Industrial Eng & Control of Product Sys

Distribution Statement : APPROVED FOR PUBLIC RELEASE