git did a merge which is always worrying

t did a fucking merge I fucking hate that#	../thesis_back_up.Tue_Feb_14_16_55_55_GMT_2012.tar.gz
This commit is contained in:
Robin Clark 2013-04-16 09:25:53 +01:00
parent 6e6e08dbe3
commit de780fab7e
5 changed files with 25 additions and 34 deletions

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@ -584,30 +584,19 @@ ISSN={1530-2059},}
keywords = "fault-tolerance"
}
@INPROCEEDINGS{syssafe2012,
author={Clark, R. and Fish, A. and Garrett, C. and Howse, J.},
booktitle={System Safety, incorporating the Cyber Security Conference 2012, 7th IET International Conference on}, title={Applying Failure Mode Modular De-Composition (FMMD) across the software/hardware interface},
year={2012},
pages={1-6},
keywords={safety-critical software;system recovery;EN298 standard;EN61508 standard;FMEA;FMMD;component failure modes;electro-mechanical-software hybrids;electronic systems;failure mode effects analysis;failure mode modular decomposition;language feature constraints;mechanical systems;nonanalytical limbo;resultant system failures;review processes;safety critical control systems;software-hardware interface;static failure mode modelling;system wide behaviour;test efficiency benefits;safetycritical;software fmea;static failure mode modelling},
doi={10.1049/cp.2012.1506},}
@article{syssafe2012,
title = "Applying Failure Mode Modular de-composition (FMMD) across the Software/Hardware Interface",
journal = "7th IET International Conference on System Safety 2012",
volume = "",
number = "",
pages = "",
year = "2012",
note = "",
issn = "",
doi = "",
url = "",
author = "Clark, R and Fish, A and Garrett, C and Howse, J",
keywords = "Failsafe",
keywords = "Software",
keywords = "FMEA",
keywords = "FMEDA",
keywords = "FMECA",
keywords = "fault",
keywords = "double-fault",
keywords = "single-fault",
keywords = "fault-tolerance"
}
@ARTICLE{ontfmea,
AUTHOR = "Lars Dittman et all",

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@ -632,13 +632,13 @@ In this section we examine some fundamental concepts and underlying philosophies
It is desirable that the failure modes for a component are mutually exclusive, were a component able
to fail in several ways at the same time, this would complicate analysis.
It would mean having to consider combinations of internal component failures
as separate failure modes. This concept is discussed in sections ~\ref{ch4:mutex}
and ~\ref{ch7:mutex}.
as separate failure modes. This concept is discussed in sections~\ref{ch4:mutex}
and~\ref{ch7:mutex}.
%
In general failure modes
for simple components are mutually exclusive
but large and complex components (such as integrated circuits), especially where they contain separate modules,
could have non mutually exclusive failure modes and these need spacial handling, see section~\ref{ch3:mutex}.
could have non mutually exclusive failure modes and these need special handling, see section~\ref{ch7:indfm}.
\paragraph{The signal path.}

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@ -377,13 +377,13 @@ All these FMEA based methodologies have the following short comings:
We now form a wish list, stating the features that we would want
in an improved FMEA methodology,
\begin{itemize}
\item Must be able to analyse {\fms} in hybrisd software/hardware systems,
\item No state explosion making analysis impractical,
\item Exhaustive checking (total failure coverage within {\fgs} all interacting component and failure modes checked),
\item Reasoning Traceable in system models,
\item Re-useable i.e. it should be possible to re-use analysis performed previously,
\item It must be possible to analyse simultaneous/multiple failures,
\item Modular --- i.e. usable in a distributed system.
\item Must be able to analyse hybrid software/hardware systems,
\item no state explosion (which would make analysis impractical),
\item exhaustive checking at a modular level, %(total failure coverage within {\fgs} all interacting component and failure modes checked),
\item traceable reasoning system models,% to aid repeatability and checking,
\item re-usable i.e. it should be possible to re-use analysis,
\item possibility to analyse simultaneous/multiple failures,
\item modular --- i.e. usable in a distributed system.
% \item
\end{itemize}

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@ -1326,6 +1326,7 @@ structure with its associated failure modes.
%
From this diagram we see that each component must have at least one failure mode.
%
\label{ch4:mutex}
To clearly show that the failure modes are mutually exclusive states, or unitary states associated with one component,
each failure mode is referenced back to only one component.
%

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@ -207,7 +207,7 @@ $i$ for identification and a superscript for the $\alpha$~level (see section~\r
%---
%o identify the hierarchy.
For example the first {\fg} in a hierarchy containing base components only
i.e. at the zeroth level of an FMMD hierarchy where $\alpha=0$, would have the superscript 0 and a subscript of 1: $FG^{0}_{1}$.
i.e. at the zero'th level of an FMMD hierarchy where $\alpha=0$, would have the superscript 0 and a subscript of 1: $FG^{0}_{1}$.
%
The {\fg} representing the potential divider in section~\ref{sec:pd}
has an $\alpha$ level of 0 (as it contains base components). The {\fg}
@ -659,6 +659,7 @@ are level shifted, adding to the complication of analysing it for failures.
%
\section{Unitary State Component Failure Mode Sets}
\label{sec:unitarystate}
%\label{ch7:mutex}
\label{ch7:mutex}
\paragraph{Design Decision/Constraint}
An important factor in defining a set of failure modes is that they
@ -1182,7 +1183,7 @@ failure modes are unitary state.
% \end{figure}
\section{Components with Independent failure modes}
\label{ch7:indfm}
Suppose that we have a component that can fail simultaneously
with more than one failure mode.
This would make it seemingly impossible to model as `unitary state'.