Testing for parallel carryover effects in redundant systems

Lim, Yongho (2016) Testing for parallel carryover effects in redundant systems. Masters thesis, Memorial University of Newfoundland.

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Redundancy is an important approach to increase the reliability and availability of systems. There has been a recent interest in analyzing failure data from redundant systems to detect the effects of adverse events. A carryover effect is defined as an effect which may cause a temporary increase in the event intensity after the occurrence of a condition or an event. We consider a parallel type of carryover effect in which the event intensity of a process is temporarily increased after event occurrences in other processes. The main goal of this thesis is to develop formal tests for the assessment of parallel carryover effects in redundant systems with repairable components connected in parallel. We, therefore, develop partial score tests for the presence of parallel carryover effects, and discuss their asymptotic properties analytically as well as through simulations. A data set based on the information obtained from a power company is analyzed to illustrate the methods developed.

Item Type: Thesis (Masters)
URI: http://research.library.mun.ca/id/eprint/12487
Item ID: 12487
Additional Information: Includes bibliographical references (pages 129-131).
Keywords: Recurrent event processes, Adverse effects, Score tests, Repairable systems, Poisson processes
Department(s): Science, Faculty of > Mathematics and Statistics
Date: October 2016
Date Type: Submission
Library of Congress Subject Heading: Redundancy (Engineering) -- Mathematical models; Reliability (Engineering) -- Mathematical models; Diesel electric power-plants -- Reliability -- Mathematical models

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