This commit is contained in:
Robin Clark 2011-01-24 18:19:42 +00:00
parent 6da60ba705
commit 3fd5d9e411
3 changed files with 5 additions and 3 deletions

View File

@ -272,7 +272,7 @@ to represent the results of analysis phases.
The four methodologies in current use are discussed briefly below. The four methodologies in current use are discussed briefly below.
\subsection { FTA } \subsection { FTA }
\glossary{name={FTA},description={Fault Tree Analysis}}
This, like all top~down methodologies introduces the very serious problem This, like all top~down methodologies introduces the very serious problem
of missing component failure modes \cite{faa}[Ch.9]. of missing component failure modes \cite{faa}[Ch.9].
%, or modelling at %, or modelling at

View File

@ -15,7 +15,7 @@ The methodology developed was designed to cope with
both the deterministic\footnote{Deterministic failure mode analysis traces failure mode effects} and probablistic approaches both the deterministic\footnote{Deterministic failure mode analysis traces failure mode effects} and probablistic approaches
\footnote{Probablistic failure mode analysis tries to determine the probability of given SYSTEM failure modes, and pfrom these \footnote{Probablistic failure mode analysis tries to determine the probability of given SYSTEM failure modes, and pfrom these
can determine an overall failure rate, in terms of probability of failure on demand, or failure in time (or Mean Time to Failure (MTTF).}. can determine an overall failure rate, in terms of probability of failure on demand, or failure in time (or Mean Time to Failure (MTTF).}.
\glossary{name={safety critical},description={A safety critical system is one in which its failure may result in death or serious injury to humans, an environemntal catastophy or severe loss or damage}} \glossary{name={safety critical},description={A safety critical system is one in which its failure may result in death or serious injury to humans, an environmental catastrophe or severe loss or damage}}
\paragraph{Safety Critical Controllers, knowledge and culture sub-disiplines} \paragraph{Safety Critical Controllers, knowledge and culture sub-disiplines}
@ -242,7 +242,7 @@ a process of modularisation from the bottom~up.
\end{list} \end{list}
\section{Safety Critical Systems} \section{Safety Critical Systems}
\glossary{name={safety critical},description={A safety critical system is one in which its failure may result in death or serious injury to humans, an environemntal catastophy or severe loss or damage}} \glossary{name={safety critical},description={A safety critical system is one in which its failure may result in death or serious injury to humans, an environmental catastrophe or severe loss or damage}}
% %
%How safe is "safe"? %How safe is "safe"?
%The word "safety" is too general—it really doesn't mean anything definitive. Therefore, we use terms such as safety-related and safety-critical. %The word "safety" is too general—it really doesn't mean anything definitive. Therefore, we use terms such as safety-related and safety-critical.

View File

@ -43,6 +43,8 @@ describe briefly what a base component failure mode is and what a system level f
\subsection { FTA } \subsection { FTA }
\glossary{name={FTA},description={Fault Tree Analysis}}
%, or modelling at %, or modelling at
%a too high level of failure mode abstraction. %a too high level of failure mode abstraction.
FTA was invented for use on the minuteman nuclear defence missile FTA was invented for use on the minuteman nuclear defence missile