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deja vu, I thought I had done this already...

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Robin Clark 2010-11-04 13:52:23 +00:00
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fmmd_design_aide/fmmd_design_aide.tex
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@ -232,6 +232,42 @@ both states of the transistor, ON and OFF.
\section{FMMD analysis of Safety Addition}
This test circuit has two operational states, in that it
can be switched on to apply the test parallel resistance, and
off to obtain the correct reading.
%
We must examine each test case from these two perspectives.
\begin{table}[h+]
\caption{Test Addition Single Fault FMMD} % title of Table
\centering % used for centering table
\begin{tabular}{||l|c|l|c||}
\hline \hline
\textbf{Test} & \textbf{Failure } & \textbf{Symptom } & \textbf{MTTF} \\
\textbf{Case} & \textbf{mode} & \textbf{ } & \\ % \textbf{per $10^9$ hours of operation} \\
% R & wire & res + & res - & description
\hline
\hline
ON TC:1 $R36$ SHORT & 5V on test line & reading out of range & 1.38 \\ \hline
OFF TC:1 $R36$ SHORT & N/A & NO SYMPTOM & 1.38 \\ \hline
ON TC:2 $R36$ OPEN & No parallel resistance & No test effect & 12.42\\ \hline
OFF TC:2 $R36$ OPEN & N/A & NO SYMPTOM & 12.42\\ \hline
\hline
ON TC:3 $TR1$ ALWAYS ON & N/A & NO SYMPTOM & 1.38 \\ \hline
OFF TC:3 $TR1$ ALWAYS ON & parallel resistance always & no test effect & 1.38 \\ \hline
ON TC:4 $TR1$ ALWAYS OFF & No parallel resistance & no test effect & 1.38 \\ \hline
OFF TC:4 $TR1$ ALWAYS OFF & N/A & NO SYMPTOM & 1.38 \\ \hline
\hline
\end{tabular}
\label{tab:testaddition}
\end{table}
For the FMMD analysis in table \ref{tab:testaddition} we have two failure modes for its derived component
`no~test~effect' or `reading~out~of~range'.
The next stage is to combine the two derived components we have made into
a functional group.
\section{FMMD Hierarchy, with milli-volt amp and safety addition}
Draw FMMD hierarchy diagram.