diff --git a/survey/survey.tex b/survey/survey.tex
index f955514..594d5ee 100644
--- a/survey/survey.tex
+++ b/survey/survey.tex
@@ -39,6 +39,23 @@ the FMMD methodology.
 \subsection{Failure Modes and System Failure Symptoms}
 describe briefly what a base component failure mode is and what a system level failure mode is.
 
+\subsection{Data Mining for Component failure modes}
+
+\subsubsection{Known component types}
+MIL1992 etc
+\subsubsection{Data sheets}
+
+\paragraph{Environmental ranges}
+Look for temperature ranges and other environmental effects
+these will give clues
+\paragraph{Log scales}
+given example of schottky diode
+\paragraph{Adjacent pin shorting scenarios}
+
+\paragraph{known device problems}
+like opamp latch up, micro processors running
+slowly when voltage too low
+
 \section {Four Current Failure Mode Analysis Methodologies}
 
 \subsection { FTA }