Principles of Prioritization for Failure Mode and Effects Analysis with Missing Risk Ratings

Failure mode and effects analysis (FMEA) is a reliability engineering methodology used to define, identify, and eliminate known and /or potential failure modes, problems, errors, for a system, design, process, and /or service. FMEA adopts a risk priority number (RPN) model which considers three risk...

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Main Author:	Ngian, Seng Kai
Format:	Thesis
Language:	English
Published:	2019
Subjects:	T Technology (General)
Online Access:	http://ir.unimas.my/id/eprint/27501/2/Ngian%20Seng%20Kai.pdf
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spelling	my-unimas-ir.275012023-04-18T07:58:03Z Principles of Prioritization for Failure Mode and Effects Analysis with Missing Risk Ratings 2019-10-16 Ngian, Seng Kai T Technology (General) TK Electrical engineering. Electronics Nuclear engineering Failure mode and effects analysis (FMEA) is a reliability engineering methodology used to define, identify, and eliminate known and /or potential failure modes, problems, errors, for a system, design, process, and /or service. FMEA adopts a risk priority number (RPN) model which considers three risk factors, i.e., Severity (S), Occurrence (O), and Detection (D), for prioritization of potential failure modes and corrective actions. However, most of the studies do not focus on the rationality of the prioritization outcomes, and assume that all risk ratings (i.e., S, O, and D ratings) are known a priori. In this thesis, three basic principles, i.e., transitivity, pareto optimality, and independence of irrelevant alternatives, are formulated to ensure rationality of prioritization of failure modes or corrective actions in FMEA, are analysed together with the rational properties of an RPN model. It is deduced that the monotonicity property is important for fulfilling the pareto optimality principle. Besides, a new tree model and a vector representation for potential failure modes and corrective actions are proposed. Moreover, an interval-valued RPN model to solve the problem with missing S, O, and/or D ratings by imputing the corresponding rational interval value(s) is further proposed. The proposed solution is evaluated analytically with respect to the aforementioned three principles. Empirical evaluations using benchmark information ascertain the usefulness of the proposed solution. Universiti Malaysia Sarawak (UNIMAS) 2019-10 Thesis http://ir.unimas.my/id/eprint/27501/ http://ir.unimas.my/id/eprint/27501/2/Ngian%20Seng%20Kai.pdf text en validuser masters Universiti Malaysia Sarawak Faculty of Engineering
institution	Universiti Malaysia Sarawak
collection	UNIMAS Institutional Repository
language	English
topic	T Technology (General) T Technology (General)
spellingShingle	T Technology (General) T Technology (General) Ngian, Seng Kai Principles of Prioritization for Failure Mode and Effects Analysis with Missing Risk Ratings
description	Failure mode and effects analysis (FMEA) is a reliability engineering methodology used to define, identify, and eliminate known and /or potential failure modes, problems, errors, for a system, design, process, and /or service. FMEA adopts a risk priority number (RPN) model which considers three risk factors, i.e., Severity (S), Occurrence (O), and Detection (D), for prioritization of potential failure modes and corrective actions. However, most of the studies do not focus on the rationality of the prioritization outcomes, and assume that all risk ratings (i.e., S, O, and D ratings) are known a priori. In this thesis, three basic principles, i.e., transitivity, pareto optimality, and independence of irrelevant alternatives, are formulated to ensure rationality of prioritization of failure modes or corrective actions in FMEA, are analysed together with the rational properties of an RPN model. It is deduced that the monotonicity property is important for fulfilling the pareto optimality principle. Besides, a new tree model and a vector representation for potential failure modes and corrective actions are proposed. Moreover, an interval-valued RPN model to solve the problem with missing S, O, and/or D ratings by imputing the corresponding rational interval value(s) is further proposed. The proposed solution is evaluated analytically with respect to the aforementioned three principles. Empirical evaluations using benchmark information ascertain the usefulness of the proposed solution.
format	Thesis
qualification_level	Master's degree
author	Ngian, Seng Kai
author_facet	Ngian, Seng Kai
author_sort	Ngian, Seng Kai
title	Principles of Prioritization for Failure Mode and Effects Analysis with Missing Risk Ratings
title_short	Principles of Prioritization for Failure Mode and Effects Analysis with Missing Risk Ratings
title_full	Principles of Prioritization for Failure Mode and Effects Analysis with Missing Risk Ratings
title_fullStr	Principles of Prioritization for Failure Mode and Effects Analysis with Missing Risk Ratings
title_full_unstemmed	Principles of Prioritization for Failure Mode and Effects Analysis with Missing Risk Ratings
title_sort	principles of prioritization for failure mode and effects analysis with missing risk ratings
granting_institution	Universiti Malaysia Sarawak
granting_department	Faculty of Engineering
publishDate	2019
url	http://ir.unimas.my/id/eprint/27501/2/Ngian%20Seng%20Kai.pdf
_version_	1783728341546696704

Principles of Prioritization for Failure Mode and Effects Analysis with Missing Risk Ratings

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