From 504bf7b8e163cf69cf784c24320e0de8fdf15b8b Mon Sep 17 00:00:00 2001 From: "Robin P. Clark" Date: Wed, 2 Jan 2013 14:40:55 +0000 Subject: [PATCH] glossary definition of observability --- submission_thesis/CH2_FMEA/copy.tex | 2 ++ 1 file changed, 2 insertions(+) diff --git a/submission_thesis/CH2_FMEA/copy.tex b/submission_thesis/CH2_FMEA/copy.tex index 961613e..566a48e 100644 --- a/submission_thesis/CH2_FMEA/copy.tex +++ b/submission_thesis/CH2_FMEA/copy.tex @@ -52,6 +52,7 @@ the effectiveness of FMEA. % \subsection{FMEA} + % This talk introduces Failure Mode Effects Analysis, and the different ways it is applied. % These techniques are discussed, and then % a refinement is proposed, which is essentially a modularisation of the FMEA process. @@ -174,6 +175,7 @@ Often the effects of a failure mode may be easy to detect, and our equipment ca Some failure modes may cause undetectable failure, for instance a component that causes a measured reading to change could have dire consequences yet not be obvious. In fault diagnosis failures are said to be observable and unobservable~\cite{721666, ACS:ACS1297}. +\glossary{name={observability}, description={The property of a system failure in relation to a particular component failure mode, where it can bedetermined whether the readings/actions associated     with it are valid, or the by-product of a failure. If we cannot determine that there is a fault present, the system level failure is said to be unobservable.}} \paragraph{Impracticality of Field Data for modern systems}