diff --git a/component_failure_modes_definition/component_failure_modes_definition.tex b/component_failure_modes_definition/component_failure_modes_definition.tex
index 6800424..0d255ea 100644
--- a/component_failure_modes_definition/component_failure_modes_definition.tex
+++ b/component_failure_modes_definition/component_failure_modes_definition.tex
@@ -175,7 +175,7 @@ As each component mode holds a set of failure modes, these set of sets of failur
 is converted into
 into a flat set 
 of failure modes
-(i.e. a set containg just containg failure modes not sets of failure mosdes).
+(i.e. a set containing just failure modes not sets of failure modes).
 %
 Each of these failure modes, and optionally combinations of them, are
 formed into `test cases' which are
diff --git a/survey/survey.tex b/survey/survey.tex
index 49f0a49..1e4806e 100644
--- a/survey/survey.tex
+++ b/survey/survey.tex
@@ -804,7 +804,12 @@ in probablistic equations.
 
 This is a lambda -exp pow integral....
 
+\section{Applying Bayes Theorem to Failure Mode Analysis}
 
+\subsection{Belief Networks}
+
+
+%http://www.csse.monash.edu.au/hons/projects/2000/Daniel.Willis/node5.html
 
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