diff --git a/fmmd_data_model/fmmd_data_model.tex b/fmmd_data_model/fmmd_data_model.tex
index f835e41..faa72ee 100644
--- a/fmmd_data_model/fmmd_data_model.tex
+++ b/fmmd_data_model/fmmd_data_model.tex
@@ -514,13 +514,6 @@ We can respresent this in the DAG in figure \ref{fig:dag2}.
      \path (s4) edge (DC-2);
      \path (s5) edge (DC-2);
 
-
-     
- 
- 
-     % Connect every node in the hidden layer with the output layer
-     %\foreach \source in {1,...,5}
-     %    \path (H-\source) edge (O);
  
      % Annotate the layers
      \node[annot,above of=C-1a, node distance=1cm] (hl) {Failure modes};
@@ -544,6 +537,13 @@ Let us say new symptom s6 can be caused by failure modes $\{C_{5 a},  C_{6 b}, K
 , let us say new symptom s7 can be caused by failure modes $\{C_{5 b},  C_{6 a}, K_{7 d} \}$
 and let us say new symptom s8 can be caused by failure mode $\{K_{7 a} \}$.
 
+%xrightarrow{\hspace*{3cm}} 
+We can represent this using a relationship $\stackrel{Collect Symptoms}{\longrightarrow}$, thus:
+
+$$ \{  C_{5 a},  C_{6 b}, K_{4 b} \} \stackrel{Collect Symptoms}{\longrightarrow} S6, $$
+$$ \{  C_{5 b},  C_{6 a}, K_{7 d} \} \stackrel{Collect Symptoms}{\longrightarrow} S7, $$
+$$ \{  K_{7 a}  \} \stackrel{Collect Symptoms}{\longrightarrow} S8. $$
+
 We can create a derived component $C^1_3$ using
 $\bowtie fm(FG^0_3) = C^1_3$
 where $fm(C^1_3) = \{ s6,s7,s8 \}$.
@@ -698,7 +698,7 @@ This is shown in the DAG in figure \ref{fig:dag3}.
 
 
 
-%\clearpage
+\clearpage
 %\pagebreak[4]
 \subsection{Using Derived Components in Functional Groups}
 
@@ -708,6 +708,9 @@ We can apply $fm$ to the derived components and
 this returns the failure modes. We can notate
 these with $a$ and $b$ etc as before, but can give them
 a subscript representing the symptom they were sourced from thus:
+%$$ fm(C^1_1) = \{ a^0_{s1}, b^0_{s2} \}, $$
+%$$ fm(C^1_2) = \{ a^0_{s3}, b^0_{s4}, c^0_{s5} \}, $$
+%$$ fm(C^1_3) = \{ a^0_{s6}, b^0_{s7}, c^0_{s8} \}. $$
 $$ fm(C^1_1) = \{ a_{s1}, b_{s2} \}, $$
 $$ fm(C^1_2) = \{ a_{s3}, b_{s4}, c_{s5} \}, $$
 $$ fm(C^1_3) = \{ a_{s6}, b_{s7}, c_{s8} \}. $$
@@ -716,15 +719,32 @@ In order to determine SYSTEM level symptoms, we need to
 use the derived components to form a higher level functional
 group and analyse that.
 
+%\clearpage
 For the sake of example, let us assume that we
 can use all three derived components to
 create a top~level functional group.
 
 Let
-$ FG^1_1 = \{ C^1_1, C^1_1, C^1_1 \} $.
+$ FG^1_1 = \{ C^1_1, C^1_2, C^1_3 \} $.
 
-Applying $fm(FG^1_1) = \{ a_{s1}, b_{s2}, a_{s3}, b_{s4}, c_{s5}, a_{s6}, b_{s7}, c_{s8} \}$.
+Applying $fm(FG_1) = \{ a_{s1}, b_{s2}, a_{s3}, b_{s4}, c_{s5}, a_{s6}, b_{s7}, c_{s8} \}$.
+%Applying $fm(FG^1_1) = \{ a^1_{s1}, b^1_{s2}, a^1_{s3}, b^1_{s4}, c^1_{s5}, a^1_{s6}, b^1_{s7}, c^1_{s8} \}$.
+
+Again for the sake of example let us determine `arbitary' common symptoms s9,s10 and s11 from
+$fm(FG^1_1)$.
+
+$$ \{ b_{s2} \} \stackrel{Collect Symptoms}{\longrightarrow} S9$$
+%$$ \{ b^1_{s2} \} \stackrel{Collect Symptoms}{\longrightarrow} S9$$
+$$ \{ a_{s3}, b_{s4}, a_{s6}, b_{s7} \}  \stackrel{Collect Symptoms}{\longrightarrow} S10  $$
+%$$ \{ a^1_{s3}, b^1_{s4}, a^1_{s6}, b^1_{s7} \}  \stackrel{Collect Symptoms}{\longrightarrow} S10  $$
+$$ \{ c_{s5}, c_{s8} \} \stackrel{Collect Symptoms}{\longrightarrow} S11 $$
+%$$ \{ c^1_{s5}, c^1_{s8} \} \stackrel{Collect Symptoms}{\longrightarrow} S11 $$
 To get our system level derived component we can apply $ \bowtie fm(FG^1_1) = C^2_1 $.
+Thus applying $fm$ to our newly derived component $ C^2_1 $
+gives its derived failure modes thus:
+%$$ fm(C^2_1) = \{ a^1_{s9},b^1_{s10},c^1_{s11} \} .$$
+$$ fm(C^2_1) = \{ a_{s9},b_{s10},c_{s11} \} .$$
+This is represented in the DAG in figure \ref{fig:dag4}.
 
 NOW THINK ABOUT THIS
 
@@ -931,7 +951,7 @@ TO RACE BACK DOWN THE DAG
  \end{tikzpicture}
  % End of code
  \caption{DAG representing failure modes and symptoms $FG^1_1 \rightarrow C^2_1$}
- \label{fig:dag3}
+ \label{fig:dag4}
  \end{figure}
 
 
diff --git a/latex_examples/mind_map.tex b/latex_examples/mind_map.tex
new file mode 100644
index 0000000..6ed4d51
--- /dev/null
+++ b/latex_examples/mind_map.tex
@@ -0,0 +1,27 @@
+\documentclass{article}
+
+\usepackage{tikz}
+\usetikzlibrary{mindmap,trees}
+\begin{document}
+\pagestyle{empty}
+\begin{tikzpicture}
+  \path[mindmap,concept color=black,text=white]
+    node[concept] {Safety Engineering}
+    [clockwise from=0]
+    child[concept color=green!50!black] {
+      node[concept] {practical}
+      [clockwise from=90]
+      child { node[concept] {Certification } }
+      child { node[concept] {Maintenance} }
+      child { node[concept] {Staff Training} }
+    }  
+    child[concept color=blue] {
+      node[concept] {applied}
+      [clockwise from=-30]
+      child { node[concept] {Standards} }
+      child { node[concept] {Insurance Liability} }
+    }
+    child[concept color=red] { node[concept] {Accident Investigation} }
+    child[concept color=orange] { node[concept] {theoretical} };
+\end{tikzpicture}\end{document}
+