From fa0723a16f74f53214bcfab1daf28f9e57291189 Mon Sep 17 00:00:00 2001 From: Robin Clark Date: Wed, 16 Nov 2011 19:19:04 +0000 Subject: [PATCH] another weakness of FMEDA identified --- survey/survey.tex | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/survey/survey.tex b/survey/survey.tex index 17ce770..e5e7ef5 100644 --- a/survey/survey.tex +++ b/survey/survey.tex @@ -657,7 +657,7 @@ safety, as it can miss unexpected effects due to `unexpected' component interact The Statistical Analysis methodology is the core philosophy of the Safety Integrity Levels (SIL) embodied in EN61508 \cite{en61508} -and its international analog standard IOC5108. +and its international analog is standard IOC5108. @@ -669,6 +669,7 @@ and its international analog standard IOC5108. \item No possibility to model base component level double failure modes. \item As with all failure mode methodologies based on FMEA, does not model component failure modes that may cause more than one type of SYSTEM failure. +\item Because FMEDA is based on one entry per component failure mode, top level symptoms are not grouped, and will be listed in a fragmented way, and may not have the same description. \end{itemize} %AND then how we can solve all there problems