A new method for obtaining the TTT plot for a censored sample

Author

Sun, Feng-Bin ; Kececloglu, D.B.

Author_Institution

Component & Production Reliability Eng., Quantum Corp., Milpitas, CA, USA

fYear

1999

fDate

18 -21 Jan 1999

Firstpage

112

Lastpage

117

Abstract

For a censored sample where withdrawns or suspensions are present, Kaplan-Meier-estimation (KME) method, also called product-limit-estimation (PLE) method, and piecewise-exponential-estimation (PEXE) method, have been typically used to estimate both the survivor function (or cdf) and the total time on test (TTT) statistic at each observed failure time. This paper presents a new method, called mean-order-number (MON) method, for estimating TTT statistics and TTT plot for a censored sample. This method is illustrated using Dodson´s example as quoted by numerous authors. A comparison is made among MON, KME, and PEXE. It turns out that MON method is not only easy to use but its results are consistent with KME and PEXE as well

Keywords

failure analysis; reliability theory; statistical analysis; Dodson´s example; Kaplan-Meier-estimation method; TTT plot; censored sample; failure time; mean-order-number method; piecewise-exponential-estimation method; product-limit-estimation method; total time on test plot; Distribution functions; H infinity control; Joining processes; Life testing; Maintenance; Statistics; Suspensions;

fLanguage

English

Publisher

ieee

Conference_Titel

Reliability and Maintainability Symposium, 1999. Proceedings. Annual

Conference_Location

Washington, DC

Print_ISBN

0-7803-5143-6

Type

conf

DOI

10.1109/RAMS.1999.744105

Filename

744105