Accession Number : AD0778640

Title :   Estimation of the Join Point in a Heteroscedastic Regression Model Arising in Accelerated Life Tests.

Descriptive Note : Scientific rept.,

Corporate Author : GEORGE WASHINGTON UNIV WASHINGTON D C PROGRAM IN LOGISTICS

Personal Author(s) : Singpurwalla,Nozer D.

Report Date : 09 APR 1974

Pagination or Media Count : 15

Abstract : In certain accelerated life test experiments, when accelerating beyond certain values of the stress, a change in the basic failure mechanism occurs. Such situations call for the introduction of two or more submodels joined at what is known as a join point. In the paper the author considers two continuous linear submodels, each applicable over a particular but unknown interval of the applied stress. It is assumed that the exponential model for failure times is valid for the entire range of the applied stress. An iterative weighted least-squares procedure is applied to data obtained from censored sample life tests conducted at different values of the applied stress. (Modified author abstract)

Descriptors :   *Accelerated testing, *Life tests, *Regression analysis, Reliability, Least squares method, Estimates

Subject Categories : Statistics and Probability
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE