Accession Number:

ADA165189

Title:

Sequential Testing and Confidence Intervals for the MTBF (Meantime between Failures) of Systems Having Exponential Distribution of the Interfailure Times

Descriptive Note:

Scientific rept.

Corporate Author:

GEORGE WASHINGTON UNIV WASHINGTON DC INST FOR MANAGEMENT SCIENCE AND ENGINEERING

Personal Author(s):

Report Date:

1985-12-23

Pagination or Media Count:

29.0

Abstract:

The application of the Wald SPRT to life testing of equipment, having an exponential distribution of the interfailure times, has been in practice from fifties. The problem discussed in the present paper is that of the exact computation of the distributions of the stopping times, and the determination of confidence limits for the meantime between failures MTBF, theta, after stopping. Formulae are developed for the exact computation of the distribution of stopping times in sequential life testing, according to a modified SPRT. These distributions yield the fractiles of the stopping times at acceptance or at rejection, from which confidence limits for the MTBF can be obtained.

Subject Categories:

  • Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE