Virtual Bookstore Citation Title SEQUENTIAL TESTING AND CONFIDENCE INTERVALS FOR THE MTBF (MEANTIME BETWEEN FAILURES) OF SYSTEMS HAVING EXPONENTIAL DISTRIBUTION OF THE INTERFAILURE TIMES Author(s) Zacks, S. Corporate Author(s) GEORGE WASHINGTON UNIV WASHINGTON DC INST FOR MANAGEMENT SCIENCE AND ENGINEERING Report Date 12/23/1985 Page Count 29 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. Price: $9.95 Available as PDF for download.   Prices are plus sales tax when purchased within New York State and shipping charges, if applicable