\documentclass[a4paper,10pt]{article} \usepackage[utf8]{inputenc} \newcommand{\cc}{comparison~complexity} \newcommand{\ft}{\ensuremath{4\!\!\rightarrow\!\!20mA} } \newcommand{\tenfifty}{\ensuremath{10\!\!\rightarrow\!\!50mA} } \usepackage{graphicx} \usepackage{fancyhdr} \usepackage{tikz} \usepackage{amsfonts,amsmath,amsthm} \usetikzlibrary{shapes.gates.logic.US,trees,positioning,arrows} \def\layersep{1.8cm} %\input{../style}\def\layersep{1.8cm} \usepackage{ifthen} \usepackage{lastpage} \usetikzlibrary{shapes,snakes} \newcommand{\tickYES}{\checkmark} %% \newcommand{\fc}{fault~scenario} \newcommand{\fc}{failure~cause} %% \newcommand{\fcs}{fault~scenarios} \newcommand{\fcs}{failure~causes} % Page layout definitions to suit A4 paper \setcounter{secnumdepth}{3} \setcounter{tocdepth}{4} \setlength{\topmargin}{0mm} \setlength{\textwidth}{160mm} \setlength{\textheight}{220mm} \setlength{\oddsidemargin}{0mm} \setlength{\evensidemargin}{0mm} % \newcommand{\permil}{\ensuremath{0/{\!}_{00}}} \newcommand{\emp}{} %% was italics \newcommand{\sd}{\ensuremath{\Sigma \Delta ADC}} %\newcommand{\sd}{\ensuremath{Sigma\;Delta\;ADC}} \newcommand{\derivec}{{D}} %\newcommand{\hh}{\ensuremath{{\stackrel{o}{H}}}} \newcommand{\hh}{\ensuremath{{\hbar}}} \newcommand{\abslev}{\ensuremath{\alpha}} \newcommand{\oc}{\ensuremath{^{o}{C}}} \newcommand{\adctw}{{${\mathcal{ADC}}_{12}$}} \newcommand{\adcten}{{${\mathcal{ADC}}_{10}$}} \newcommand{\ohms}[1]{\ensuremath{#1\Omega}} \newcommand{\fm}{\emp failure~mode} \newcommand{\fms}{\emp failure~modes} \newcommand{\FG}{\ensuremath{{FG}}} \newcommand{\DC}{\ensuremath{{DC}}} \newcommand{\fg}{\emp functional~grouping} \newcommand{\fgs}{\emp functional~groupings} \newcommand{\Fgs}{\emp Functional~groupings} \newcommand{\dc}{\emp derived~component} \newcommand{\dcs}{\emp derived~components} \newcommand{\bc}{\emp base~component} \newcommand{\Bc}{\emp Base~component} \newcommand{\bcs}{\emp base~components} \newcommand{\irl}{in~real~life} \newcommand{\enc}{\ensuremath{\stackrel{enc}{\longrightarrow}}} \newcommand{\pin}{\ensuremath{\stackrel{pi}{\longleftrightarrow}}} \newcommand{\half}{\ensuremath{\frac{1}{2}}} \newcommand{\cf}[1]{\textbf{#1()}} \newcommand{\etc}{Energy~Technology~Control~Ltd} % % OK after about 3 years its not rigorous FMEA (RFMEA) anymore, oh no, its Exhaustive FMEA % but since the fuckers might change it yet again, I am making this a macro. \newcommand{\XFMEA}{XFMEA} % %\newcommand{\pic}{\em pure~intersection~chain} \newcommand{\pic}{\emp pair-wise~intersection~chain} \newcommand{\wrt}{\emp with~respect~to} \newcommand{\swf}{software~function} % DO NOT USE THIS ONE USE \abslev \newcommand{\abslevel}{\ensuremath{\Psi}} \renewcommand{\baselinestretch}{1.5} %opening \title{Abstract for Phd Thesis: Failure Mode Modular De-Composition} \author{R. P. Clark} \begin{document} \maketitle \begin{abstract} % % This should be a three hundred word summary of the work and findings % Supervisors did not warn me this was required. % I found out by reading the OU ``how to get a PhD'' book in the bath, and then wading through the Brighton University % regulations where it is stated on page 14 of a 30+ page document filled with mostly n/a regulations to me. % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % BEGINING --- Introduce the field %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% The certification process of safety critical products for European and other international standards typically demand environmental stress, endurance and electro magnetic compatibility testing. % Theoretical, or `static~testing' also a requirement. % Failure Mode Effects Analysis (FMEA) is a tool used for static testing. FMEA is a bottom-up technique that aims to assess the effects of all component failure modes in a system. % Its use is traditionally limited to hardware systems. % only. % With the growing complexity of modern electronics traditional FMEA is suffering from state explosion and re-use of analysis problems. % Also with the now ubiquitous use of micro-controllers in smart~instruments and control systems, software is increasingly being seen as a `missing~factor' for FMEA. % analysis. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % Middle work and findings %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% This thesis presents a new modular variant of FMEA, Failure Mode Modular Decomposition (FMMD). % FMMD has been designed to integrate mechanical/electronic and software failure models, by treating them all as components in terms of their failure modes. % For instance, software functions, electronic and mechanical components can all be assigned sets of failure modes. % FMMD builds failure mode models from the bottom-up by incrementally analysing {\fgs} of components, using the results of analysis to create higher level {\dcs}, which in turn can be used to build {\fgs}. % In this way a hierarchical failure mode model is built. % Software functions are treated as components by FMMD and can thus be incorporated seamlessly into the failure mode hierarchical model. % A selection of examples, electronic circuits and hardware/software hybrids are analysed using this new methodology. % The results of these analyses are then discussed from the perspective of safety critical application. % Performance in terms of test efficiency is greatly improved by FMMD and the examples analysed and theoretical models are used to demonstrate this. % %Because FMMD is modular and hierarchical, and deals with all its objects in %terms of their failure mode behaviour, it is ideally suited to creating integrated software and hardware models. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % End what has been achieved ---- all in 300ish word OK here we go. %Conclusions are presented listing the %and FMMD is compared with traditional HFMEA and SFMEA. This thesis presents a methodology that solves the state explosion problems of FMEA; provides integrated hardware and software failure mode models; facilitates multiple failure mode analysis; encourages re-use of analysis work and can be used to produce traditional format FMEA reports. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \end{abstract} \end{document}