On a Life Distribution Family Based on Total Time on Test on Average: NBUTA

by A. N. Ahmed, H. M. Hewedi, E. A. Rakha and E. M..

Abstract: A new class of life distributions, namely new better than used in the total time on test on average transform ordering (TTTA), is introduced. The relationship of this class to other classes of life distributions, and closure properties under some reliability operations, are discussed. We provide a simple argument based on stochastic orders that the class is closed under the formation of series systems in case of independent identically distributed components. Behavior of this class is developed in terms of the monotonicity of the residual life of k -out-of n systems given the time at which the (n-k)-th failure has occurred. Finally, we discuss testing exponentially against the aging property.

Key Words: Increasing concave order, k out-of n systems, life testing, mixing, random minima, series system, stochastic order, transform order

A. N. Ahmed, profhadi@mailer.eun.eg
H. M. Hewedi, hamedheweidi@yahoo.com
E. A. Rakha, ecics@hotmail.com
E. M. Shokry, eshokry@mcit.gov.eg

Editor: Chaganty, N. Rao, rchagant@odu.edu

READING THE ARTICLE: You can read the article in portable document (.pdf) format (199118 bytes.)

NOTE: The content of this article is the intellectual property of the authors, who retains all rights to future publication.

This page has been accessed 2095 times since AGUST 10, 2008.

Return to the InterStat Home Page.