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IEICE TRANSACTIONS on Fundamentals

Some Remarks on MTBF's for Non-homogeneous Poisson Processes

Hirofumi KOSHIMAE, Hiroaki TANAKA, Shunji OSAKI

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Summary :

Non-homogeneous Poisson Processes (NHPP's) can be applied for analyzing reliability growth models for hardware and/or software. Evaluating the Mean Time Between Failures (MTBF's) for such processes, we can evaluate the present status (the degree of improvement). However, it is difficult to evaluate the MTBF's for such processes analytically except the simplest cases. The so-called instantaneous MTBF's which can be easily evaluated are applied in practice instead of the exact MTBF's. In this paper, we discuss both MTBF's analytically, and derive the conditions for the existence of both exact and instantaneous MTBF's. We further illustrate both MTBF's for the Weibull process and S-shaped reliability growth model numerically.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E77-A No.1 pp.144-149
Publication Date
1994/01/25
Publicized
Online ISSN
DOI
Type of Manuscript
Special Section PAPER (Special Section on Reliability)
Category
System Reliability

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