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Robin Clark 2011-01-27 14:15:27 +00:00
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style.tex
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@ -86,6 +86,7 @@
\newcommand{\fmodegloss}{\glossary{name={failure mode},description={The way in which a failure occurs. A component or sub-system may fail in a number of ways, and each of these is a \newcommand{\fmodegloss}{\glossary{name={failure mode},description={The way in which a failure occurs. A component or sub-system may fail in a number of ways, and each of these is a
failure mode of the component or sub-system}}} failure mode of the component or sub-system}}}
\newcommand{\fmeagloss}{\glossary{name={FMEA}, description={Failure Mode and Effects analysis (FMEA) is a process where each potential failure mode within a SYSTEM, is analysed to determine SYSTEM level failure modes, and to then classify them {\wrt} percieved severity}}} \newcommand{\fmeagloss}{\glossary{name={FMEA}, description={Failure Mode and Effects analysis (FMEA) is a process where each potential failure mode within a SYSTEM, is analysed to determine SYSTEM level failure modes, and to then classify them {\wrt} percieved severity}}}
\newcommand{\frategloss}{\glossary{name={failure rate}, description={The number of failure within a population (of size N), divided by N over a given time interval}}}

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survey/survey.tex
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@ -333,6 +333,7 @@ part number, environmental stress factors, MTTF, safe/dangerous etc.
The product failure rate is the sum of all component The product failure rate is the sum of all component
failure rates. Typically the sum of all MTTF rates for all failure rates. Typically the sum of all MTTF rates for all
components in an FMEDA spreadsheet. components in an FMEDA spreadsheet.
\frategloss
%This is the sum of safe and unsafe %This is the sum of safe and unsafe
%failures. %failures.
@ -838,7 +839,7 @@ Discuss hardware failsafes (good example over pressure saefty values).
Keep relating these back to bayes theorem. Keep relating these back to bayes theorem.
\subsection{Deterministic FMEA} \subsection{Deterministic FMEA}
# FMEA cannot handle simultaneous failure modes..... ........... FMEA cannot handle simultaneous failure modes.....
EN298 no two individual component failures may give rise to a dangerous condition. EN298 no two individual component failures may give rise to a dangerous condition.