From 0746358207432075a1d9a8cb358a7a51e531f5a2 Mon Sep 17 00:00:00 2001
From: Robin Clark <r.clark@energytechnologycontrol.com>
Date: Thu, 4 Nov 2010 13:52:23 +0000
Subject: [PATCH] deja vu, I thought I had done this already...

---
 fmmd_design_aide/fmmd_design_aide.tex | 36 +++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/fmmd_design_aide/fmmd_design_aide.tex b/fmmd_design_aide/fmmd_design_aide.tex
index 3917c71..5f519b6 100644
--- a/fmmd_design_aide/fmmd_design_aide.tex
+++ b/fmmd_design_aide/fmmd_design_aide.tex
@@ -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.