diff --git a/25_Outline/sections/20_foundations.tex b/25_Outline/sections/20_foundations.tex
index dc4acd7..f2c7e23 100644
--- a/25_Outline/sections/20_foundations.tex
+++ b/25_Outline/sections/20_foundations.tex
@@ -10,11 +10,11 @@ Formally a configuration problem can be specified as a \emph{constraint satisfac
 \begin{equation} \label{eq:Foundations:ProductConfiguration:ConstraintSatisfactionProblem}
     CSP(V,\mathfrak{D},C),
 \end{equation}
-where we have a set of \emph{variables} $V$ with
+where we have a set of \emph{variables} $V$ (which in this thesis will also be referred to as \emph{features}) with
 \begin{equation} \label{eq:Foundations:ProductConfiguration:Variables}
     V = \{v_1, \dotsc, v_m\},
 \end{equation}
-a \emph{domain mapping} $\mathfrak{D}$ that maps variable to their corresponding domain values $D$ i.e. the values that can be assigned to each variable
+a \emph{domain mapping} $\mathfrak{D}$ that maps variable to their corresponding domain values $D$ (which in this thesis will be also referred to as \emph{characteristics}) i.e. the values that can be assigned to each variable
 \begin{equation}\label{eq:Foundations:ProductConfiguration:DomainMapping}
     \mathfrak{D} : V \to D; x \mapsto \mathfrak{D}(x) \qquad where \ D = \{d_1, \dotsc, d_o\},
 \end{equation}