diff --git a/config/framework.tex b/config/framework.tex
index cafa1d0..8869817 100644
--- a/config/framework.tex
+++ b/config/framework.tex
@@ -39,6 +39,8 @@ citecolor = black]{hyperref}%
 \pagestyle{scrheadings}		% switch on head and foot line
 \newpage
 \tableofcontents
+\newpage
+\listoffigures
 \input{config/headfoot.tex}
 \newpage
 \input{content.tex}
diff --git a/content.tex b/content.tex
index b9f917d..5f14bc8 100644
--- a/content.tex
+++ b/content.tex
@@ -1,6 +1,76 @@
-\begin{center}
-\input{img_gitlab_dev.tex}
-\end{center}
-\begin{center}
-\input{img_gitlab_rel.tex}
-\end{center}
+\section{Gitlab workflow} \label{sec:glw}
+\begin{figure}
+	\begin{center}
+		\input{img_gitlab_rel.tex}
+		\caption{Gitlab workflow}
+		\label{fig:gitlab_workflow}
+	\end{center}
+\end{figure}
+Figure \ref{fig:gitlab_workflow} gives an overview of the gitlab workflow.
+The workflow is splitted in different phases:\\
+\begin{itemize}
+	\item Implementation phase
+	\item Code freeze
+	\item Release phase
+\end{itemize}
+For these different phases The continuous integration/delivery system
+triggers different build stages. For further details please refer to
+section \ref{sec:ci}.
+\subsection{Implementation phase}
+While in implementation phase every implementation for the next release is
+done. Every implementation has to be done on a seperate branch. After
+finishing an implementation the branch it was made on has to be merged back
+to the master branch. As defined an implementation could be one of:\\
+\begin{itemize}
+	\item Feature
+	\item Fix
+\end{itemize}
+\subsubsection{Feature implementation}
+A feature is a a new piece of code that implements new functionality into
+the system.
+\subsubsection{Fix implementation}
+If in any testing phase an issue is detected these issue can be fixed with
+a fix implementation.
+\subsubsection{Further kinds of implementation}
+Beside these defined implementations any other kind of implementation is
+possible but has to be made also on a seperate branch.
+\subsection{Code freeze}
+The transition between implementation phase and release phase is called
+code freeze. Code freeze means each for the upcoming release planned
+feature is implemented and merged to the main branch (normally master) of
+the project's git repository (see figure \ref{fig:gitlab_workflow}). For
+the upcoming release a "\texttt{release/...}" named branch is created.
+\subsection{Release phase}
+Any release relevant issue that is detected while release phase has to be
+fixed at the release branch. The release phase is splitted into different
+stages:
+\begin{itemize}
+	\item Internal release(s)
+	\item External release
+\end{itemize}
+\subsubsection{Internal release(s)}
+Each push to a release branch triggers the creation of an internal release.
+Only internal releases must be used to system test the release branch. For
+details please refer to section \ref{sec:ci_int}.
+\subsubsection{External release}
+If no further release relevant issues could be found (or are accepted as
+known issues) an external release is created by tagging the commit which
+should be delivered to the customer. For details please refer to section
+\ref{sec:ci_ext}.
+\section{Continuous integration/delivery} \label{sec:ci}
+As continuous integration system the gitlab built in ci-system
+\textit{gitlab-ci} is used. Beside the most important task of ci, ensure
+constant high code quality, the ci system is used for various tasks:
+\begin{itemize}
+	\item Automated static code analysis (not implemented yet)
+	\item Automated build
+	\item Automated test (not implemented yet)
+	\item Internal release deployment
+	\item External release deployment
+\end{itemize}
+
+%\subsection{External release deployment} \label{sec:ci_ext}
+%An external release must be tagged with following naming convention:\\
+%\texttt{release/<project\_specific\_name>}.\\
+%The project specific naming convention for Agricola ruby is:\\
+%\texttt{release/174\_AG*}.\\
diff --git a/img_gitlab_dev.tex b/img_gitlab_dev.tex
index 8196daa..14b4fbf 100644
--- a/img_gitlab_dev.tex
+++ b/img_gitlab_dev.tex
@@ -23,7 +23,7 @@
 	\psline[linewidth=2pt,linecolor=\clr](\masterx,8)(\featurex,7)
 	\psline[linewidth=2pt,linecolor=\clr](\featurex,7)(\featurex,4)
 	\psline[linewidth=2pt,linecolor=\clr,arrowsize=15pt]{->}(\featurex,4)(\masterx,3)
-	\psline[linewidth=1pt,linecolor=\clr,linestyle=dashed](\featurex,8)(\featurex,1)
+	\psline[linewidth=1pt,linecolor=\clr,linestyle=dashed](\featurex,8)(\featurex,3)
 	\multido{\nA=4+1.5}{3}{
 		\psset{fillcolor=\clr}
 		\psdot[dotsize=10pt,dotstyle=o,linecolor=\clr](\featurex,\nA)
@@ -42,25 +42,18 @@
 		\psset{framearc=.5}
 		\psframebox{\textcolor{\clr}{merge request}}
 	}
-	\rput(2,3){
-		\psset{fillcolor=white}
-		\psset{fillstyle=solid}
-		\psset{linecolor=\clr}
-		\psset{framearc=.5}
-		\psframebox{\textcolor{\clr}{merge request done}}
-	}
 	% fix/calibration_crc
 	\renewcommand{\clr}{Maroon}
 	\newcommand{\fixx}{8}
 	\psline[linewidth=2pt,linecolor=\clr](\masterx,7)(\fixx,6)
 	\psline[linewidth=2pt,linecolor=\clr](\fixx,6)(\fixx,3)
 	\psline[linewidth=2pt,linecolor=\clr,linestyle=dashed,arrowsize=15pt]{->}(\fixx,3)(\masterx,2)
-	\psline[linewidth=1pt,linecolor=\clr,linestyle=dashed](\fixx,8)(\fixx,1)
+	\psline[linewidth=1pt,linecolor=\clr,linestyle=dashed](\fixx,7)(\fixx,2)
 	\multido{\nA=3+1.5}{3}{
 		\psset{fillcolor=\clr}
 		\psdot[dotsize=10pt,dotstyle=o,linecolor=\clr](\fixx,\nA)
 	}
-	\rput(\fixx,8.5){
+	\rput(\fixx,7.5){
 		\psset{fillcolor=white}
 		\psset{fillstyle=solid}
 		\psset{linecolor=\clr}
@@ -74,12 +67,5 @@
 		\psset{framearc=.5}
 		\psframebox{\textcolor{\clr}{merge request}}
 	}
-	\rput(10,2){
-		\psset{fillcolor=white}
-		\psset{fillstyle=solid}
-		\psset{linecolor=\clr}
-		\psset{framearc=.5}
-		\psframebox{\textcolor{\clr}{merge request open}}
-	}
 \end{pspicture}
-\captionof{figure}{Gitlab workflow while development}
+\captionof{figure}{development workflow}
diff --git a/img_gitlab_rel.tex b/img_gitlab_rel.tex
index f1311d9..1472dfd 100644
--- a/img_gitlab_rel.tex
+++ b/img_gitlab_rel.tex
@@ -1,10 +1,41 @@
 \psset{griddots=0,gridlabels=8pt,subgriddiv=5}
 \psset{xunit=10mm,yunit=10mm}
-\begin{pspicture}(12,20)
-	\psgrid
-	% master
+\begin{pspicture}(14,20)
+%	\psgrid
 	\newcommand{\clr}{black}
-	\newcommand{\masterx}{6}
+	% phases
+	\psline[linewidth=1pt,linecolor=\clr,linestyle=dashed](0,18)(14,18)
+	\psline[linewidth=1pt,linecolor=\clr,linestyle=dashed](0,12)(14,12)
+	\psline[linewidth=1pt,linecolor=\clr,linestyle=dashed](0,4)(14,4)
+	\rput{0}(1.5,12){
+		\psset{fillcolor=white}
+		\psset{fillstyle=solid}
+		\psset{linecolor=\clr}
+		\psset{framearc=.5}
+		\psframebox{\textcolor{\clr}{code freeze}}
+	}
+	\psline[linewidth=1pt,linecolor=\clr]{->}(13.5,17)(13.5,17.9)
+	\psline[linewidth=1pt,linecolor=\clr]{->}(13.5,13)(13.5,12.1)
+	\rput{90}(13.5,15){
+		\psset{fillcolor=white}
+		\psset{fillstyle=solid}
+		\psset{linecolor=\clr}
+		\psset{framearc=.5}
+		\psframebox{\textcolor{\clr}{implementation phase}}
+	}
+	\psline[linewidth=1pt,linecolor=\clr]{->}(13.5,9.2)(13.5,11.9)
+	\psline[linewidth=1pt,linecolor=\clr]{->}(13.5,6.6)(13.5,4.1)
+	\rput{90}(13.5,8){
+		\psset{fillcolor=white}
+		\psset{fillstyle=solid}
+		\psset{linecolor=\clr}
+		\psset{framearc=.5}
+		\psframebox{\textcolor{\clr}{release phase}}
+	}
+
+
+	% master
+	\newcommand{\masterx}{7}
 	\psline[linewidth=2pt,linecolor=\clr,arrowsize=15pt]{->}(\masterx,19)(\masterx,1)
 	\psset{fillcolor=\clr}
 	\psdot[dotsize=10pt,dotstyle=o,linecolor=\clr](\masterx,18)
@@ -22,7 +53,7 @@
 	}
 	% feature/anti_osc
 	\renewcommand{\clr}{ForestGreen}
-	\newcommand{\featurex}{4}
+	\newcommand{\featurex}{5}
 	\psline[linewidth=2pt,linecolor=\clr](\masterx,18)(\featurex,17)
 	\psline[linewidth=2pt,linecolor=\clr](\featurex,17)(\featurex,14)
 	\psline[linewidth=2pt,linecolor=\clr,arrowsize=15pt]{->}(\featurex,14)(\masterx,13)
@@ -40,7 +71,7 @@
 	}
 	% fix/calibration_crc
 	\renewcommand{\clr}{Maroon}
-	\newcommand{\fixx}{8}
+	\newcommand{\fixx}{9}
 	\psline[linewidth=2pt,linecolor=\clr](\masterx,17)(\fixx,16)
 	\psline[linewidth=2pt,linecolor=\clr](\fixx,16)(\fixx,13)
 	\psline[linewidth=2pt,linecolor=\clr,arrowsize=15pt]{->}(\fixx,13)(\masterx,12)
@@ -58,9 +89,9 @@
 	}
 	% feature/dynamic_monitoring
 	\renewcommand{\clr}{RoyalBlue}
-	\renewcommand{\fixx}{10}
+	\renewcommand{\fixx}{11}
 	\psline[linewidth=2pt,linecolor=\clr](\masterx,15)(\fixx,13)
-	\psline[linewidth=2pt,linecolor=\clr,arrowsize=15pt]{->}(\fixx,13)(\fixx,1)
+	\psline[linewidth=2pt,linecolor=\clr,arrowsize=15pt]{->}(\fixx,13)(\fixx,8.5)
 	\psline[linewidth=1pt,linecolor=\clr,linestyle=dashed](\fixx,14)(\fixx,9)
 	\rput(\fixx,14.5){
 		\psset{fillcolor=white}
@@ -71,9 +102,11 @@
 	}
 	\psset{fillcolor=\clr}
 	\psdot[dotsize=10pt,dotstyle=o,linecolor=\clr](\fixx,13)
+	\psdot[dotsize=10pt,dotstyle=o,linecolor=\clr](\fixx,11.5)
+	\psdot[dotsize=10pt,dotstyle=o,linecolor=\clr](\fixx,10)
 	% release/NAR_C0
 	\renewcommand{\clr}{RedOrange}
-	\renewcommand{\fixx}{4}
+	\renewcommand{\fixx}{5}
 	\psline[linewidth=2pt,linecolor=\clr](\masterx,12)(\fixx,11)
 	\psline[linewidth=2pt,linecolor=\clr](\fixx,11)(\fixx,5)
 	\psline[linewidth=1pt,linecolor=\clr,linestyle=dashed](\fixx,12)(\fixx,4)
@@ -85,6 +118,13 @@
 		\psset{framearc=.5}
 		\psframebox{\textcolor{\clr}{release/NAR\_C0}}
 	}
+	\rput(2.5,5){
+		\psset{fillcolor=\clr}
+		\psset{fillstyle=solid}
+		\psset{linecolor=\clr}
+		\psset{framearc=.5}
+		\psframebox{\textcolor{white}{\shortstack{tags/release/\\174\_AG\_NA\_10-01.02}}}
+	}
 	\psset{fillcolor=\clr}
 	\psdot[dotsize=10pt,dotstyle=o,linecolor=\clr](\fixx,11)
 	\psdot[dotsize=10pt,dotstyle=o,linecolor=\clr](\fixx,9.5)
@@ -92,4 +132,3 @@
 	\psdot[dotsize=10pt,dotstyle=o,linecolor=\clr](\fixx,6.5)
 	\psdot[dotsize=10pt,dotstyle=o,linecolor=\clr](\fixx,5)
 \end{pspicture}
-\captionof{figure}{Gitlab workflow while release}