From 67b627930f400b47537ff446d88a787d7bd62829 Mon Sep 17 00:00:00 2001
From: Robin Clark <r.clark@energytechnologycontrol.com>
Date: Wed, 28 Jul 2010 13:35:24 +0100
Subject: [PATCH] .

---
 symptom_ex_process/topbot.tex | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/symptom_ex_process/topbot.tex b/symptom_ex_process/topbot.tex
index c8611b5..a9a97c8 100644
--- a/symptom_ex_process/topbot.tex
+++ b/symptom_ex_process/topbot.tex
@@ -35,6 +35,24 @@ and checks will be made, and finally a component or a low level sub-system
 will be found to be faulty.
 A natural fault finding process is thus top~down.
 Top down fault isolation/finding techniques are described in \ref{NETWORKDECOMPOSITION}.
+
+%% insert diagram here
+\begin{figure}[h]
+ \centering
+ \includegraphics[width=300pt,bb=0 0 587 445,keepaspectratio=true]{./top_down_de_comp.jpg}
+ % top_down_de_comp.jpg: 587x445 pixel, 72dpi, 20.71x15.70 cm, bb=0 0 587 445
+ \caption{Top Down Failure De-Composition Diagram}
+ \label{fig:tdh}
+\end{figure}
+
+\subsection{Top-Down System De-Composition}
+
+A top down fault analysis system will take a system and divide it into
+several sub-systems, and determine the safety dependencies
+of the System on those sub-systems. In the case of large complicated 
+Systems, the sub-systems themselves may be broken down into simpler sub-systems.
+A top down hierarchy is shown in figure \ref{fig:tdh}.
+
 \subsection{FMMD - Bottom~up Analysis}
 The FMMD technique does not follow the `natural fault finding' or top down approach,
 it instead works from the bottom up.