diff --git a/fmmd_concept/fmmd_concept.tex b/fmmd_concept/fmmd_concept.tex
index b57eb89..f2be36f 100644
--- a/fmmd_concept/fmmd_concept.tex
+++ b/fmmd_concept/fmmd_concept.tex
@@ -610,6 +610,31 @@ new {\fg}s and we can build a hierarchical `failure~mode' model of the SYSTEM.
 NEED DIAGRAM OF HIERACY
 \vspace{20pt}
 
+
+\subsection{Environmental and Operational States and FMMD}
+
+Introduce the ideas
+
+\subsubsection {Environmental Conditions and FMMD}
+
+HERE talk about environmental effects of a sub-system.
+
+Define this further by identifying that
+environmental conditions affect components
+
+for instance a system may be speced for
+0 to 85oC operation, but some components
+may show failure behaviour between 60 and 85
+
+\subsubsection {Operational States and FMMD}
+HERE talk about operational states of a sub-system
+
+Define this further by stating that 
+operational states are effects on a functional group.
+For instance a circuit may have a test line input.
+The fnctional group will there fore have two
+operational states, testing mode and normal mode.
+
 \subsection{Justification of wishlist}
 
 By applying the methodology in section \ref{fmmdproc}, the wishlist can